Debut and early years

Nielsen made his ATP singles debut in Copenhagen, losing to Magnus Larsson in the first round d 6–1, 6–1. In 2003, he made his Davis Cup debut in the Europe/Africa Zone Group II tie against Tunisia at Hillerod, Denmark and defeated Malek Jaziri 6–1, 6–4 in the dead rubber, Denmark winning 4–1. Nielsen also won the singles title at the Futures event in Vietnam.

In 2004, Nielsen teamed with countryman Rasmus Nørby to win 5 Futures doubles titles. Reached 1 Futures Singles final. He won 1 doubles Futures title and 2 titles in 4 Futures singles finals in 2005. In 2006, he won doubles title at 2 Challengers and 7 Futures. Also won 3 Futures singles titles.

In 2007, Nielsen won doubles titles at 3 Challengers and Futures. 2-time singles winner at Futures. In 2008, Nielsen won 2 doubles Challengers and 1 Futures, all three with different partners. In 2009, he won 3 Challengers tournaments in doubles and 1 Futures title in singles.

In 2010, Nielsen won 2 Challengers and 3 Futures in Men's doubles. He also won singles Futures event in Italy. The following year, he won 5 Challengers doubles titles with 3 different partners; he was the finalist at 3 other events.

2012: Wimbledon doubles champion

Nielsen represented Denmark at the 2012 Hopman Cup alongside Caroline Wozniacki, but the pair could not get past the Group Stages. Nielsen had a 1–4 Win–loss record at the event, 1–1 in doubles and 0–3 in singles. He played much higher ranked opponents in Tomáš Berdych, Grigor Dimitrov and Mardy Fish. He managed to win 1 set against Fish but eventually lost 4–6, 7–6, 6–4. Nielsen and Wozniacki still managed to pull out the doubles match against Fish and Bethanie Mattek-Sands 7–5, 6-3 and won their only tie against USA.

Nielsen won the 2012 Wimbledon Championships doubles crown alongside Jonathan Marray.

He then played at the Australian Open and qualified for the main draw at a Grand Slam for the first time but lost to Kevin Anderson 6–1, 6–2, 6–4 in the first round. In February, Nielsen was selected for the Davis Cup Europe/Africa Zone Group I tie against Slovenia, which Denmark lost 5–0.

Nielsen had been friends with Jonny Marray since their early days on the senior tour,^[3] but had only played together twice before in 2006^[4] and 2008.^[5]

Playing doubles with Marray in June, their first pairing of the year, they reached the Nottingham Challenger finals, losing out to Treat Huey and Dominic Inglot in three tight sets 4–6, 7-6(9), 8-10. They compiled a 10-6 match record in 6 tournaments.

Then Nielsen and Marray received a wild card at the All England Club and began their 2012 Wimbledon Championships with a 5-set win over Marcel Granollers and Marc Lopez, one of 4 teams they beat en route that qualified for Barclays ATP World Tour Finals. In the third-round, they edged out another five set victory this time against Aisam-Ul-Haq Qureshi and Jean-Julien Rojer 7–5 in 5th set, followed with victory over James Cerretani and Edouard Roger-Vasselin in the quarters in five sets again. In the Semi-Finals they caused the biggest upset by beating No. 2 seeds Bryans in 4 sets 6–4, 7-6(9), 6-7(4), 7-6(5). In the title clash they defeated the No. 5 seeds Robert Lindstedt and Horia Tecau in 5-sets 4–6, 6–4, 7-6(5), 6-7(5), 6–3. Marray was first British doubles champion at Wimbledon since 1936 and Nielsen was first Dane to win the doubles crown.

Following Wimbledon, they played together in 4 tournaments (2-4 record), losing first round in Winston-Salem, second round at Us Open losing to Jesse Levine and Marinko Matosevic having beaten the Italian duo of Flavio Cipolla and Fabio Fognini in the first round. They had a quarter-final in Basel losing out to Mariusz Fyrstenberg and Marcin Matkowski.

Nielsen and Marray made their debut at the Barclays ATP World Tour Finals in London, qualifying for the season finale as a result of their Wimbledon crown, and reached the Semi-Finals losing out to eventual champions Marcel Granollers and Marc Lopez 4–6, 3–6. In the Round-Robin stage the pair defeated top pairs including Indian pair of Mahesh Bhupathi and Rohan Bopanna 6–4, 6-7(1), 12–10, Max Mirnyi and Daniel Nestor 7-6(3), 4–6, 12-10 losing only to Robert Lindstedt and Horia Tecau in the Group Stage.

Nielsen finished the year as top Danish player in doubles, a year-end best No. 21 individually and No. 9 in ATP Doubles Team Rankings with Marray. He also earned a career-high $334,901 in 2012 courtesy of his win at Wimbledon.

2013: Doubles career high ranking

Nielsen at the 2013 French Open

At the start of 2013, Nielsen partnered Johan Brunstrom for the first time since September 2012 at Metz, they reached the final of 2013 Heineken Open at Auckland losing out to Colin Fleming and Bruno Soares in two tough sets 6-7(1), 6-7(2). Dropped to 1-2 overall in tour-level finals. They lost in the first round of 2013 Australian Open to Simone Bolelli and Fabio Fognini 3–6, 4–6.

The Dane then partnered Bulgarian Grigor Dimitrov for World Tour Masters 1000 Miami and Indian Wells reaching second round of the former and Semi-Finals his first at Masters event losing out to Mariusz Fyrstenberg and Marcin Matkowski 4–6, 2–6. Played with André Sá in 2013 Power Horse Cup at Düsseldorf and fell in the Semis to Andre Begemann and Martin Emmrich. Along with Matkowski, reached Semis of 2013 Aegon International losing to Colin Fleming and Jonathan Marray 11–9 in Match Tie-Break. Played with Eric Butorac at the 2013 Winston-Salem Open, reached Semi-Finals where they lost out to Daniel Nestor-and Leander Paes 3–6, 2–6.

2014: ATP 250 doubles title

Nielsen partnered Johan Brunstrom and they entered the 2014 Aircel Chennai Open in January, the pair did not lose a single set on their route to the finals and went on to win the title defeating Marin Draganja and Mate Pavic 6–2, 4–6, 10–7. This was Nielsen's first title other than Wimbledon.

In January at Copenhagen during the Davis Cup Europe/Africa Zone Group II First Round Cyprus tie, he won both his singles and doubles matches partnering Thomas Kromann.

He then partnered Igor Sijsling for the 2014 Heineken Open and reached the quarters to only go down to the top seeds Alexander Peya and Bruno Soares 5–7, 5–7. He played at the Australian Open alongside Brunstrom and reached the second round before going down to Julien Benneteau and Edouard Roger-Vasselin in a tight three-setter 6–0, 5–7, 3–6.

Next he played at the Davis Cup Europe/Africa Zone Group II Luxembourg tie in April, winning both his singles and the doubles alongside Thomas Kromann, leading Denmark to a 5–0 victory, and to the Final Round in the Europe/Africa Zone Group II.

Partnering Brunstrom, he reached the semis at the 2014 Düsseldorf Open losing out to Martin Emmrich and Christopher Kas 0–6, 5–7. At the 2014 French Open the pair lost in the first round to Spaniards Marcel Granollers and Marc Lopez 5–7, 2–6. They next participated in the Wimbledon Championships falling in the second round.

In September, he played the Davis Cup Europe/Africa Zone Group II Denmark vs. Moldova tie, winning the first singles rubber and the doubles match but losing the reverse singles, thereby helping promote Denmark to the 2015 Davis Cup Europe/Africa Zone Group I.

He also won 3 ITF $15000 doubles titles at Switzerland, Dublin, Great Britain in March, July and October respectively with different and 1 ATP Challenger doubles title at Charlottesville Men's Pro Challenger in 2014.

Singles

Doubles

Grand Slam finals

Doubles: 1 (1 title)

Outcome	Year	Championship	Surface	Partner	Opponents	Score
Win	2012	Wimbledon	Grass	Jonathan Marray	Robert Lindstedt Horia Tecău	4–6, 6–4, 7–6(7–5), 6–7(5–7), 6–3

Doubles: 6 (3 titles, 3 runner-ups)

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Win	1–0	Jul 2012	Wimbledon, United Kingdom	Grand Slam	Grass	Jonathan Marray	Robert Lindstedt Horia Tecău	4–6, 6–4, 7–6(7–5), 6–7(5–7), 6–3
Loss	1–1	Sep 2012	Moselle Open, France	250 Series	Hard (i)	Johan Brunström	Nicolas Mahut Édouard Roger-Vasselin	6–7(3–7), 4–6
Loss	1–2	Jan 2013	Auckland Open, New Zealand	250 Series	Hard	Johan Brunström	Colin Fleming Bruno Soares	6–7(1–7), 6–7(2–7)
Win	2–2	Jan 2014	Chennai Open, India	250 Series	Hard	Johan Brunström	Marin Draganja Mate Pavić	6–2, 4–6, [10–7]
Loss	2–3	Apr 2019	Grand Prix Hassan II, Morocco	250 Series	Clay	Matwé Middelkoop	Jürgen Melzer Franko Škugor	4–6, 6–7(6–8)
Win	3–3	May 2019	Bavarian Championships, Germany	250 Series	Clay	Tim Pütz	Marcelo Demoliner Divij Sharan	6–4, 6–2

Singles: 32 (14–18)

Result	W–L	Date	Tournament	Tier	Surface	Opponent	Score
Win	1–0	Nov 2003	Vietnam F1, Hanoi	Futures	Hard	Matthew Smith	6–4, 7–6(7–5)
Loss	1–1	Sep 2004	Sweden F2, Gothenburg	Futures	Hard (i)	Jacob Adaktusson	7–5, 2–6, 1–6
Win	2–1	Mar 2005	Great Britain F3, Sunderland	Futures	Hard (i)	Mark Hilton	6–4, 7–6(11–9)
Win	3–1	Sep 2005	Spain F23, Madrid	Futures	Hard	Daniel Muñoz de la Nava	6–4, 2–6, 7–6(7–4)
Loss	3–2	Sep 2005	Sweden F2, Gothenburg	Futures	Hard (i)	Johan Settergren	4–6, 4–6
Loss	3–3	Nov 2005	Australia F9, Aberfoyle Park	Futures	Hard	Marc Kimmich	3–6, 2–6
Loss	3–4	Apr 2006	Sweden F2, Linköping	Futures	Carpet (i)	Marcus Sarstrand	6–7(5–7), 3–6
Win	4–4	Apr 2006	Sweden F3, Norrköping	Futures	Hard (i)	Jasper Smit	6–3, 6–4
Win	5–4	Jun 2006	Ireland F1, Limerick	Futures	Carpet	Andis Juška	6–2, 6–2
Loss	5–5	Aug 2006	Finland F2, Helsinki	Futures	Hard	Gary Lugassy	4–6, 4–6
Win	6–5	Sep 2006	Italy F29, Piombino	Futures	Hard	Andrey Golubev	6–2, 6–4
Loss	6–6	Feb 2007	Great Britain F4, Exmouth	Futures	Carpet (i)	Gary Lugassy	1–6, 6–7(3–7)
Win	7–6	Mar 2007	Italy F7, Monterotondo	Futures	Clay	Francesco Piccari	4–6, 6–4, 6–3
Win	8–6	Oct 2007	Great Britain F19, Jersey	Futures	Hard (i)	Dawid Olejniczak	6–4, 6–7(6–8), 6–4
Loss	8–7	Nov 2007	Great Britain F21, Redbridge	Futures	Hard (i)	Vladimir Voltchkov	1–6, 6–4, 4–6
Loss	8–8	Jan 2008	China F1, Shenzhen	Futures	Hard	Laurent Recouderc	3–6, 3–6
Loss	8–9	Jul 2008	Dublin, Ireland	Challenger	Carpet (i)	Robert Smeets	6–7(5–7), 2–6
Win	9–9	Apr 2009	South Korea F3, Changwon	Futures	Hard	Kim Young-jun	3–6, 6–3, 6–4
Loss	9–10	Sep 2009	Sweden F1, Lidköping	Futures	Hard (i)	Timo Nieminen	2–6, 2–6
Loss	9–11	Sep 2009	Sweden F2, Falun	Futures	Hard (i)	Pablo Figueroa	3–6, 6–4, 2–6
Win	10–11	May 2010	Italy F10, Cesena	Futures	Clay	Matwé Middelkoop	7–5, 6–7(5–7), 3–3 ret.
Loss	10–12	Nov 2010	Loughborough, Great Britain	Challenger	Hard (i)	Matthias Bachinger	3–6, 6–3, 1–6
Loss	10–13	May 2012	South Korea F1, Daegu	Futures	Hard	Sam Groth	7–6(7–4), 4–6, 1–6
Win	11–13	Mar 2013	Great Britain F5, Cardiff	Futures	Hard (i)	Edward Corrie	6–4, 6–2
Win	12–13	Jun 2014	Spain F13, Martos	Futures	Hard	David Vega Hernández	6–3, 6–2
Win	13–13	Sep 2014	Great Britain F15, London	Futures	Hard	Marcus Willis	2–6, 6–4, 6–4
Loss	13–14	Nov 2014	Champaign, USA	Challenger	Hard (i)	Adrian Mannarino	2–6, 2–6
Loss	13–15	Jan 2015	USA F4, Long Beach	Futures	Hard	Takanyi Garanganga	7–6(7–5), 3–6, 4–6
Win	14–15	Jun 2016	Spain F17, Martos	Futures	Hard	Rémi Boutillier	6–4, 6–3
Loss	14–16	Nov 2016	Great Britain F5, Sheffield	Futures	Hard (i)	Maxime Authom	5–7, 1–6
Loss	14–17	Nov 2016	Great Britain F6, Barnstaple	Futures	Hard (i)	Neil Pauffley	4–6, 4–6
Loss	14–18	Dec 2017	Thailand F11, Hua Hin	Futures	Hard	Renta Tokuda	2–6, 4–6

Doubles: 88 (60–28)

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Win	1–0	Jan 2004	Germany F3, Oberhaching	Futures	Hard (i)	Rasmus Nørby	Łukasz Kubot Igor Zelenay	6–4, 6–7(6–8), 6–0
Win	2–0	Jun 2004	Finland F1, Savitaipale	Futures	Clay	Rasmus Nørby	Petr Dezort Adam Vejmělka	6–3, 3–6, 6–3
Win	3–0	Jun 2004	Finland F2, Vierumäki	Futures	Clay	Rasmus Nørby	Bart Beks Rick Schalkers	7–6(7–2), 6–3
Win	4–0	Jul 2004	Denmark F1, Helsingør	Futures	Clay	Rasmus Nørby	Johan Brunström Alexander Hartman	6–3, 6–3
Win	5–0	Jul 2004	Denmark F2, Hørsholm	Futures	Clay	Rasmus Nørby	Andrea Arnaboldi Nicolas Tourte	6–3, 6–0
Loss	5–1	Jan 2005	Great Britain F1, Leeds	Futures	Hard (i)	Rasmus Nørby	Eric Butorac Travis Rettenmaier	6–7(4–7), 4–6
Loss	5–2	Jan 2005	Wrexham, Great Britain	Challenger	Hard (i)	Tuomas Ketola	Mark Hilton Jonathan Marray	3–6, 2–6
Loss	5–3	Mar 2005	Great Britain F3, Sunderland	Futures	Hard (i)	Petar Popović	Roman Kukal Ján Stančík	3–6, 6–3, 4–6
Loss	5–4	May 2005	Great Britain F7, Oxford	Futures	Grass	Sadik Kadir	Robert Green Jim May	3–6, 3–6
Win	6–4	Sep 2005	Spain F23, Madrid	Futures	Hard	Rasmus Nørby	Jorge Jiménez-Letrado Marcos Jiménez-Letrado	6–2, 6–4
Loss	6–5	Oct 2005	Kolding, Denmark	Challenger	Hard (i)	Rasmus Nørby	Stephen Huss Johan Landsberg	6–1, 6–7(4–7), [8–10]
Win	7–5	Jan 2006	Germany F1, Nußloch	Futures	Carpet (i)	Rasmus Nørby	Philipp Marx Torsten Popp	6–3, 7–6(7–3)
Win	8–5	Mar 2006	Switzerland F3, Oberentfelden	Futures	Carpet (i)	Carl Henrik Hansen	Giuseppe Menga Frank Moser	6–2, 7–5
Win	9–5	Apr 2006	Sweden F1, Malmö	Futures	Hard (i)	Rasmus Nørby	Robert Gustafsson Rickard Holmström	6–3, 6–4
Win	10–5	Apr 2006	Sweden F2, Linköping	Futures	Carpet (i)	Rasmus Nørby	Ervin Eleskovic Carl Henrik Hansen	7–5, 6–4
Win	11–5	Apr 2006	Sweden F3, Norrköping	Futures	Hard (i)	Jasper Smit	Ervin Eleskovic Carl Henrik Hansen	6–3, 7–6(7–4)
Win	12–5	Jun 2006	Ireland F1, Limerick	Futures	Carpet	Rasmus Nørby	Troy Hahn Brian Wilson	6–2, 6–2
Win	13–5	Aug 2006	Finland F2, Helsinki	Futures	Hard	Juho Paukku	KC Corkery Robert Searle	3–6, 6–4, 6–3
Win	14–5	Nov 2006	Rimouski, Canada	Challenger	Carpet (i)	Kristian Pless	Jasper Smit Martijn van Haasteren	6–2, 6–4
Win	15–5	Nov 2006	Shrewsbury, Great Britain	Challenger	Hard (i)	Philipp Marx	Lars Burgsmüller Mischa Zverev	6–4, 6–4
Loss	15–6	Feb 2007	Bergamo, Italy	Challenger	Hard (i)	Kenneth Carlsen	Jérôme Haehnel Jean-René Lisnard	3–6, 6–2, [4–10]
Win	16–6	Mar 2007	Italy F6, Catania	Futures	Clay	Martin Pedersen	Alexandros Jakupovic Dušan Karol	6–4, 7–5
Loss	16–7	Apr 2007	South Korea F1, Seogwipo	Futures	Hard	Daniel King-Turner	Im Kyu-tae Takahiro Terachi	3–6, 3–6
Loss	16–8	Sep 2007	Grenoble, France	Challenger	Hard (i)	Martin Pedersen	Jasper Smit Martijn van Haasteren	3–6, 1–6
Win	17–8	Oct 2007	Kolding, Denmark	Challenger	Hard (i)	Rasmus Nørby	Philipp Petzschner Alexander Peya	4–6, 6–3, [10–8]
Win	18–8	Oct 2007	Barnstaple, Great Britain	Challenger	Hard (i)	Aisam Qureshi	Jasper Smit Martijn van Haasteren	6–2, 6–7(4–7), [10–2]
Win	19–8	Nov 2007	Shrewsbury, Great Britain	Challenger	Hard (i)	Rasmus Nørby	Edward Allinson Ian Flanagan	6–3, 6–2
Loss	19–9	Jan 2008	China F2, Dongguan	Futures	Hard	Rasmus Nørby	Paolo Lorenzi Giancarlo Petrazzuolo	4–6, 6–7(1–7)
Win	20–9	Mar 2008	Sarajevo, Bosnia and Herzegovina	Challenger	Hard (i)	Johan Brunström	Alexander Peya Lovro Zovko	6–4, 7–6(7–4)
Loss	20–10	May 2008	Aarhus, Denmark	Challenger	Clay	Martin Pedersen	Dawid Olejniczak Jean-Julien Rojer	6–7(4–7), 6–2, [8–10]
Win	21–10	Jun 2008	Ireland F2, Limerick	Futures	Carpet	Michel Koning	Alberto Francis Nima Roshan	6–1, 7–6(9–7)
Loss	21–11	Jul 2008	Dublin, Ireland	Challenger	Carpet (i)	Jonathan Marray	Prakash Amritraj Aisam Qureshi	3–6, 6–7(6–8)
Win	22–11	Nov 2008	Toyota, Japan	Challenger	Hard (i)	Aisam Qureshi	Chen Ti Grzegorz Panfil	7–5, 6–3
Loss	22–12	Apr 2009	South Korea F3, Changwon	Futures	Hard	Ervin Eleskovic	Li Zhe Wang Yu jr.	2–6, 3–6
Win	23–12	May 2009	Carson, USA	Challenger	Hard	Harsh Mankad	Carsten Ball Travis Rettenmaier	6–4, 6–4
Win	24–12	Jul 2009	Recanati, Italy	Challenger	Hard	Joseph Sirianni	Adriano Biasella Andrey Golubev	6–4, 3–6, [10–6]
Win	25–12	Nov 2009	Jersey, Great Britain	Challenger	Hard (i)	Joseph Sirianni	Henri Kontinen Jarkko Nieminen	7–5, 3–6, [10–2]
Loss	25–13	Apr 2010	Monza, Italy	Challenger	Clay	Martin Fischer	Daniele Bracciali David Marrero	3–6, 3–6
Win	26–13	Apr 2010	Italy F5, Padova	Futures	Clay	Federico Torresi	Karim Maamoun Sherif Sabry	7–5, 4–6, [10–4]
Loss	26–14	May 2010	Italy F6, Vicenza	Futures	Clay	Daniel Smethurst	Nicola Remedi Andrea Stoppini	2–6, 4–6
Win	27–14	Jun 2010	Italy F11, Bergamo	Futures	Clay	Alessandro Giannessi	Stefano Ianni Matteo Volante	6–4, 7–6(7–3)
Win	28–14	Jun 2010	Netherlands F3, Rotterdam	Futures	Clay	Alexandre Renard	Ivo Klec Bas van der Valk	6–3, 6–3
Win	29–14	Aug 2010	Granby, Canada	Challenger	Hard	Joseph Sirianni	Sanchai Ratiwatana Sonchat Ratiwatana	4–6, 6–4, [10–6]
Loss	29–15	Sep 2010	Bangkok, Thailand	Challenger	Hard	Yūichi Sugita	Sanchai Ratiwatana Sonchat Ratiwatana	3–6, 5–7
Win	30–15	Nov 2010	Loughborough, Great Britain	Challenger	Hard (i)	Henri Kontinen	Jordan Kerr Ken Skupski	6–2, 6–4
Win	31–15	Jan 2011	Nouméa, New Caledonia	Challenger	Hard	Dominik Meffert	Flavio Cipolla Simone Vagnozzi	7–6(7–4), 5–7, [10–5]
Win	32–15	Feb 2011	Bergamo, Italy	Challenger	Hard (i)	Ken Skupski	Mikhail Elgin Alexander Kudryavtsev	w/o
Loss	32–16	Feb 2011	Wolfsburg, Germany	Challenger	Carpet (i)	Dominik Meffert	Matthias Bachinger Simon Stadler	6–3, 6–7(3–7), [7–10]
Win	33–16	Apr 2011	Monza, Italy	Challenger	Clay	Johan Brunström	Jamie Delgado Jonathan Marray	5–7, 6–2, [10–7]
Win	34–16	Jul 2011	Recanati, Italy	Challenger	Hard (i)	Ken Skupski	Federico Gaio Purav Raja	6–4, 7–5
Win	35–16	Aug 2011	Segovia, Spain	Challenger	Hard	Johan Brunström	Nicolas Mahut Lovro Zovko	6–2, 3–6, [10–6]
Loss	35–17	Aug 2011	Binghamton, USA	Challenger	Hard	Treat Huey	Juan Sebastián Cabal Robert Farah	4–6, 3–6
Loss	35–18	Nov 2011	Knoxville, USA	Challenger	Hard (i)	Adam Hubble	Steve Johnson Austin Krajicek	6–3, 4–6, [11–13]
Win	36–18	Jan 2012	Heilbronn, Germany	Challenger	Hard (i)	Johan Brunström	Treat Huey Dominic Inglot	6–3, 3–6, [10–6]
Win	37–18	Apr 2012	Chinese Taipei F2, Kaohsiung	Futures	Hard	Denis Matsukevitch	An Jae-sung Kim Young-jun	6–4, 6–1
Loss	37–19	Apr 2012	Kaohsiung, Chinese Taipei	Challenger	Hard	Daniel King-Turner	John Paul Fruttero Raven Klaasen	7–6(8–6), 5–7, [8–10]
Win	38–19	May 2012	South Korea F2, Changwon	Futures	Hard	Michael Look	Huang Liang-chi Yi Chu-huan	6–2, 6–1
Loss	38–20	Jun 2012	Nottingham, Great Britain	Challenger	Grass	Jonathan Marray	Treat Huey Dominic Inglot	4–6, 7–6(11–9), [8–10]
Loss	38–21	Mar 2014	Great Britain F7, Preston	Futures	Hard (i)	Joshua Ward-Hibbert	Luke Bambridge Liam Broady	4–6, 4–6
Win	39–21	Mar 2014	Switzerland F1, Taverne	Futures	Carpet (i)	Jesper Brunström	Laurynas Grigelis Henri Laaksonen	6–4, 7–6(7–4)
Win	40–21	Jul 2014	Ireland F1, Dublin	Futures	Carpet	Edward Corrie	Peter Bothwell David O'Hare	6–2, 7–5
Win	41–21	Sep 2014	Great Britain F15, London	Futures	Hard	Joshua Ward-Hibbert	David O'Hare Joe Salisbury	6–7(5–7), 6–4, [10–8]
Win	42–21	Nov 2014	Charlottesville, USA	Challenger	Hard (i)	Treat Huey	Lewis Burton Marcus Willis	3–6, 6–3, [10–2]
Loss	42–22	Jan 2015	USA F2, Los Angeles	Futures	Hard	James Cluskey	Dimitar Kutrovsky Dennis Novikov	6–4, 1–6, [4–10]
Win	43–22	Aug 2015	Vancouver, Canada	Challenger	Hard	Treat Huey	Yuki Bhambri Michael Venus	7–6(7–4), 6–7(3–7), [10–5]
Win	44–22	Oct 2015	Tiburon, USA	Challenger	Hard	Johan Brunström	Carsten Ball Matt Reid	7–6(7–2), 6–1
Win	45–22	Oct 2015	Fairfield, USA	Challenger	Hard	Johan Brunström	Dustin Brown Carsten Ball	6–3, 5–7, [10–5]
Win	46–22	Nov 2015	Knoxville, USA	Challenger	Hard (i)	Johan Brunström	Sekou Bangoura Matt Seeberger	6–1, 6–2
Win	47–22	Jan 2016	Manila, Philippines	Challenger	Hard	Johan Brunström	Francis Casey Alcantara Christopher Rungkat	6–2, 6–2
Loss	47–23	Apr 2016	Gwangju, South Korea	Challenger	Hard	David O'Hare	Sanchai Ratiwatana Sonchat Ratiwatana	3–6, 2–6
Loss	47–24	May 2016	Taipei, Chinese Taipei	Challenger	Carpet (i)	David O'Hare	Hsieh Cheng-peng Yang Tsung-hua	6–7(6–8), 4–6
Win	48–24	Jun 2016	Spain F18, Palma del Río	Futures	Hard	David O'Hare	Nicolás Barrientos Jaume Pla Malfeito	6–4, 6–2
Win	49–24	Mar 2017	Canada F2, Sherbrooke	Futures	Hard (i)	Isak Arvidsson	Miķelis Lībietis Hugo Nys	6–0, 6–4
Win	50–24	Apr 2017	Saint Brieuc, France	Challenger	Hard (i)	Andre Begemann	David O'Hare Joe Salisbury	6–3, 6–4
Win	51–24	Jun 2017	Spain F18, Palma del Río	Futures	Hard	David O'Hare	Adrien Bossel Matteo Viola	6–1, 7–6(7–1)
Win	52–24	Sep 2017	France F18, Bagnères-de-Bigorre	Futures	Hard	Edward Corrie	Niels Lootsma Denis Matsukevitch	6–4, 6–2
Win	53–24	Feb 2018	Great Britain F2, Loughborough	Futures	Hard (i)	Harri Heliövaara	Jack Findel-Hawkins Luke Johnson	6–4, 6–1
Loss	53–25	Feb 2018	Great Britain F3, Shrewsbury	Futures	Hard (i)	Harri Heliövaara	Scott Clayton Marcus Willis	2–6, 5–7
Win	54–25	Mar 2018	Drummondville, Canada	Challenger	Hard (i)	Joris De Loore	Luis David Martínez Filip Peliwo	6–4, 6–3
Win	55–25	May 2018	Seoul, South Korea	Challenger	Hard	Toshihide Matsui	Chen Ti Yi Chu-huan	6–4, 7–6(7–3)
Win	56–25	May 2018	Loughborough, Great Britain	Challenger	Hard (i)	Joe Salisbury	Luke Bambridge Jonny O'Mara	3–6, 6–3, [10–4]
Win	57–25	Jun 2018	Nottingham, Great Britain	Challenger	Grass	Joe Salisbury	Austin Krajicek Jeevan Nedunchezhiyan	7–6(7–5), 6–1
Loss	57–26	Nov 2018	Charlottesville, USA	Challenger	Hard (i)	Toshihide Matsui	Harri Heliövaara Henri Laaksonen	3–6, 4–6
Win	58–26	Nov 2018	Knoxville, USA	Challenger	Hard (i)	Toshihide Matsui	Hunter Reese Tennys Sandgren	7–6(8–6), 7–5
Loss	58–27	May 2019	Aix-en-Provence, France	Challenger	Clay	Tim Pütz	Kevin Krawietz Jürgen Melzer	6–7(5–7), 2–6
Win	59–27	Nov 2019	Bratislava, Slovakia	Challenger	Hard (i)	Tim Pütz	Roman Jebavý Igor Zelenay	4–6, 7–6(7–4), [11–9]
Win	60–27	Nov 2019	Helsinki, Finland	Challenger	Hard (i)	Tim Pütz	Tomislav Draganja Pavel Kotov	7–6(7–2), 6–0
Loss	60–28	Nov 2021	Charlottesville, USA	Challenger	Hard (i)	Treat Huey	William Blumberg Max Schnur	6-3, 1-6, [12-14]