2007–2008

Robert missed 16 months of tennis action in 2007–2008 because he was infected with the Hepatitis A virus in February 2007. In early June 2008, he returned to tennis action at the ITF Men's Circuit tournament in Apeldoorn, without an ATP singles ranking, reaching the final as a qualifier.^[2]

2010

On 1 February 2010, Robert broke into Top 100 of the ATP singles rankings for the first time at No. 100. Within one week of his singles rankings breakthrough and seeded no. 8, he defeated for the first time in his career a player (David Ferrer) ranked in the top 20 of the ATP singles rankings in the semifinals before reaching his first ATP World Tour singles final at the 2010 SA Tennis Open, falling to 3rd-seeded Feliciano López 5–7, 1–6. Robert rose to a career-high of No. 61 of the ATP singles rankings on 22 February 2010 one day after winning the ATP Challenger Tour singles title in Tangier.^[2]

2011

Robert rose to international prominence in 2011 when, as a qualifier, he beat the 2010 Wimbledon singles finalist and sixth seed Tomáš Berdych 3–6, 3–6, 6–2, 6–2, 9–7 in the first round of the 2011 French Open to register the biggest singles win of his career, having saved a match point at 4–5 in the deciding set. It was the first time that he had beaten a player ranked in the top 10 of the ATP singles rankings – Berdych was ranked no. 6. Robert lost his second round match to Fabio Fognini in straight sets.^[2]

2014: Reached Australian Open fourth round as lucky loser

Robert reached the singles 4th round of a Grand Slam tournament for the first time at the 2014 Australian Open, where he lost to 4th seeded Andy Murray. He was only one of 2 lucky losers to reach the 4th round of a Grand Slam tournament since Dick Norman achieved the feat at the 1995 Wimbledon Championships, David Goffin (at the 2012 French Open) being the other.

Robert and Jesse Huta Galung became only the third lucky loser doubles team to clinch an ATP World Tour doubles title by defeating Daniel Nestor and Nenad Zimonjić in the final of the 2014 Barcelona Open Banc Sabadell. That was Robert's first ATP World Tour doubles final appearance. After losing in the 1st round of the 2014 Wimbledon Championships to Nick Kyrgios, Robert missed the rest of the year because of leg injury.^[2]

2016

Robert qualified for the singles main draw of the 2016 Australian Open by winning three qualifying matches, and he lost in the third round of the main draw to Gaël Monfils. That was only the second time Robert had progressed to the third round of the singles main draw of a Grand Slam tournament.

On July 15, 2016, Robert, who was unseeded and had an ATP singles ranking of 83 coming into the tournament, reached the semi-final at the 2016 German Open, where he lost to Martin Kližan. It was Robert's first ATP World Tour semi-final since February 2010, when he was defeated in the final in Johannesburg.^[3] Robert's ATP singles ranking reached a career-high of 59 on July 18, 2016, right after his semi-final appearance in Hamburg, which was a massive improvement over his ATP singles ranking of 558 on 25 May 2015.^[4]

Singles: 1 (1 runner-up)

Result	W–L	Date	Tournament	Tier	Surface	Opponent	Score
Loss	0–1	Feb 2010	SA Tennis Open, South Africa	250 Series	Hard	Feliciano López	5–7, 1–6

Doubles: 1 (1 title)

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Win	1–0	Apr 2014	Barcelona Open, Spain	500 Series	Clay	Jesse Huta Galung	Daniel Nestor Nenad Zimonjić	6–3, 6–3

Singles: 39 (23–16)

Result	No.	Date	Tournament	Surface	Opponent	Score
Win	1.	February 25, 2002	Jaffa, Israel	Hard	Branislav Sekáč	6–4, 6–2
Win	2.	June 2, 2003	Kranj, Slovenia	Clay	Ivan Esquerdo	6–4, 3–6, 7–5
Win	3.	July 14, 2003	Belgrade, Serbia and Montenegro	Clay	Todor Enev	6–2, 4–1, ret.
Win	4.	July 21, 2003	Belgrade, Serbia and Montenegro	Clay	Vladimir Pavićević	6–3, 6–3
Win	5.	September 8, 2003	Sofia, Bulgaria	Clay	Daniel Elsner	6–1, 4–6, 7–6(7–4)
Win	6.	September 13, 2004	Budapest, Hungary	Clay	Alessio di Mauro	6–1, 4–6, 7–5
Win	7.	October 17, 2005	Barcelona, Spain	Clay	Pablo Andújar	7–5, 6–3
Loss	1.	January 2, 2006	Exmouth, United Kingdom	Carpet (i)	Andis Juška	3–6, 6–1, 4–6
Win	8.	January 9, 2006	Barnstaple, United Kingdom	Hard (i)	Jérémy Chardy	7–6(7–3), 6–1
Loss	2.	January 24, 2006	Wrexham, United Kingdom	Hard (i)	Alex Bogdanović	3–6, 2–6
Win	9.	January 16, 2007	Sunderland, United Kingdom	Hard (i)	Thomas Oger	6–2, 7–5
Win	10.	February 13, 2007	Barnstaple, United Kingdom	Hard (i)	Torsten Popp	7–5, 7–5
Loss	3.	June 9, 2008	Apeldoorn, Netherlands	Clay	Thiemo de Bakker	6–7(2–7), 1–6
Loss	4.	June 23, 2008	Toulon, France	Clay	Nicolas Coutelot	4–6, 4–6
Loss	5.	August 4, 2008	Avezzano, Italy	Clay	Michael Ryderstedt	2–6, 0–6
Win	11.	September 15, 2008	Nottingham, United Kingdom	Hard	Josh Goodall	6–4, 6–0
Win	12.	September 29, 2008	Nevers, France	Hard (i)	Vincent Millot	6–4, 6–1
Win	13.	January 13, 2009	Glasgow, United Kingdom	Hard (i)	Colin Fleming	2–6, 6–4, 6–4
Loss	6.	January 27, 2009	Mettmann, Germany	Carpet (i)	Lukáš Rosol	6–7(6–8), 4–6
Win	14.	February 16, 2009	Trento, Italy	Hard (i)	Josh Goodall	6–4, 6–3
Loss	7.	March 10, 2009	Tipton, United Kingdom	Hard (i)	Yannick Mertens	6–7(4–7), 6–7(5–7)
Win	15.	March 17, 2009	Bath, United Kingdom	Hard (i)	Colin Fleming	6–2, 6–3
Win	16.	June 8, 2009	Košice, Slovakia	Clay	Jiří Vaněk	7–6(7–5), 7–6(7–5)
Win	17.	September 13, 2009	Alphen aan den Rijn, Netherlands	Clay	Michael Russell	7–6(7–2), 5–7, 7–6(7–5)
Loss	8.	October 25, 2009	Orléans, France	Hard (i)	Xavier Malisse	1–6, 2–6
Loss	9.	November 15, 2009	Saint Brélade, Jersey	Carpet (i)	Jarkko Nieminen	6–4, 1–6, 5–7
Win	18.	February 21, 2010	Tangier, Morocco	Clay	Aleksandr Dolgopolov Jr.	7–6(7–5), 6–4
Loss	10.	March 20, 2011	Le Gosier, Guadeloupe	Hard	Olivier Rochus	2–6, 3–6
Win	19.	May 1, 2011	Ostrava, Czech Republic	Clay	Ádám Kellner	6–1, 6–3
Loss	11.	February 2, 2013	Burnie, Australia	Hard	John Millman	2–6, 6–4, 0–6
Win	20.	February 17, 2013	Melbourne, Australia	Hard	James Duckworth	7–6(7–3), 6–3
Loss	12.	September 14, 2013	Seville, Spain	Clay	Daniel Gimeno Traver	4–6, 6–7(2–7)
Loss	13.	November 8, 2015	Hua Hin, Thailand	Hard	Yūichi Sugita	2–6, 6–1, 3–6
Win	21.	February 21, 2016	New Delhi, India	Hard	Saketh Myneni	6–3, 6–0
Loss	14.	March 20, 2016	Guadalajara, Mexico	Hard	Malek Jaziri	7–5, 3–6, 6–7(5–7)
Loss	15.	July 11, 2016	Prague, Czech Republic	Clay	Adam Pavlásek	4–6, 6–3, 3–6
Loss	16.	September 24, 2017	İzmir, Turkey	Hard	Illya Marchenko	6–7(2–7), 0–6
Win	22.	November 12, 2017	Kobe, Japan	Hard(i)	Calvin Hemery	7–6(7–1), 6–7(5–7), 6–1
Win	23.	February 4, 2018	Burnie, Australia	Hard	Daniel Altmaier	6–1, 6–2

Doubles: 33 (14–19)

Result	No.	Date	Tournament	Surface	Partner	Opponents	Score
Loss	1.	February 17, 2003	Lorca, Spain	Clay	Esteban Carril	Salvador Navarro Gabriel Trujillo	2–6, 0–6
Win	1.	February 24, 2003	Cartagena, Spain	Clay	Miles Maclagan	Salvador Navarro Gabriel Trujillo	7–6(7–3), 7–6(7–4)
Loss	2.	May 5, 2003	Edinburgh, United Kingdom	Clay	Slimane Saoudi	Rik de Voest Marcus Sarstrand	3–6, 1–6
Loss	3.	July 14, 2003	Belgrade, Serbia and Montenegro	Clay	Xavier Audouy	Todor Enev Radoslav Lukaev	4–6, 7–6(9–7), 4–6
Win	2.	July 21, 2003	Belgrade, Serbia and Montenegro	Clay	Mohamed Mamoun	Nikola Ćirić Goran Tošić	7–5, 6–2
Loss	4.	November 17, 2003	Curaçao, Netherlands Antilles	Hard	Alessandro Motti	Michel Koning Steven Korteling	3–6, 6–3, 1–6
Win	3.	November 24, 2003	Oranjestad, Aruba	Hard	Alessandro Motti	Bart Beks Paul Logtens	6–4, 6–0
Loss	5.	July 5, 2004	Budaörs, Hungary	Clay	Ota Fukárek	Ignacio González Gabriel Trujillo	6–3, 2–6, 3–6
Win	4.	August 2, 2004	Poznań, Poland	Clay	Adam Chadaj	Tomáš Cibulec David Škoch	3–6, 6–1, 6–2
Loss	6.	June 13, 2005	Blois, France	Clay	Esteban Carril	Bart Beks Matwé Middelkoop	6–4, 2–6, 3–6
Loss	7.	July 4, 2005	Budaörs, Hungary	Clay	Adam Chadaj	Amir Hadad Harel Levy	4–6, 7–6(9–7), 3–6
Win	5.	November 21, 2005	Saint-Leu, Réunion	Hard	Teymuraz Gabashvili	Ivan Cerović Petar Popović	6–4, 6–3
Win	6.	January 24, 2006	Wrexham, United Kingdom	Hard (i)	Jean-François Bachelot	Colin Fleming Jamie Murray	6–4, 7–5
Win	7.	February 27, 2006	Cherbourg, France	Hard (i)	Jean-François Bachelot	Sanchai Ratiwatana Sonchat Ratiwatana	7–6(7–5), 6–3
Loss	8.	March 27, 2006	Saint-Brieuc, France	Clay (i)	Michael Lammer	Eric Butorac Chris Drake	4–6, 4–6
Win	8.	January 15, 2007	Sunderland, United Kingdom	Hard (i)	Jean-François Bachelot	Fabio Colangelo Marco Crugnola	6–3, 6–4
Win	9.	February 12, 2007	Barnstaple, United Kingdom	Hard (i)	Aisam-ul-Haq Qureshi	Philip Stolt Lars Uebel	6–2, 6–3
Win	10.	July 7, 2008	Bourg-en-Bresse, France	Clay	Alexandre Renard	Thomas Cazes-Carrère Baptiste Dupuy	6–4, 7–5
Loss	9.	July 21, 2008	Modena, Italy	Clay	Mohammed Ghareeb	Guillermo Hormazábal Hans Podlipnik Castillo	3–6, 2–6
Loss	10.	August 4, 2008	Avezzano, Italy	Clay	Alexandre Renard	Guillermo Hormazábal Hans Podlipnik Castillo	3–6, 7–6(7–4), [10–12]
Loss	11.	September 29, 2008	Nevers, France	Hard (i)	Alexandre Renard	Vincent Millot Pierrick Ysern	2–6, 4–6
Loss	12.	May 17, 2009	Bordeaux, France	Clay	Xavier Pujo	Pablo Cuevas Horacio Zeballos	6–4, 4–6, [4–10]
Loss	13.	July 12, 2009	San Benedetto del Tronto, Italy	Clay	Niels Desein	Stefano Ianni Cristian Villagrán	6–7(3–7), 6–1, [6–10]
Loss	14.	September 27, 2009	Ljubljana, Slovenia	Clay	Simone Vagnozzi	Jamie Delgado Jamie Murray	3–6, 3–6
Win	11.	March 20, 2011	Le Gosier, Guadeloupe	Hard	Riccardo Ghedin	Arnaud Clément Olivier Rochus	6–2, 5–7, [10–7]
Win	12.	May 1, 2011	Ostrava, Czech Republic	Clay	Olivier Charroin	Andis Juška Alexander Kudryavtsev	6–4, 6–3
Loss	15.	July 3, 2011	Braunschweig, Germany	Clay	Olivier Charroin	Martin Emmrich Andreas Siljeström	6–0, 4–6, [7–10]
Loss	16.	July 17, 2011	Sopot, Poland	Clay	Olivier Charroin	Mariusz Fyrstenberg Marcin Matkowski	5–7, 6–7(4–7)
Win	13.	July 24, 2011	Poznań, Poland	Clay	Olivier Charroin	Franco Ferreiro Andre Sá	6–2, 6–3
Loss	17.	March 17, 2012	Rabat, Morocco	Clay	Martin Kližan	Íñigo Cervantes Huegun Federico Delbonis	7–6(7–3), 1–6, [5–10]
Loss	18.	April 6, 2012	Saint-Brieuc, France	Clay	Laurent Rochette	Laurynas Grigelis Rameez Junaid	6–1, 2–6, [6–10]
Win	14.	September 14, 2013	Seville, Spain	Clay	Alessandro Motti	Stephan Fransen Wesley Koolhof	7–5, 7–5
Loss	19.	September 27, 2015	Trnava, Slovakia	Clay	Kamil Majchrzak	Wesley Koolhof Matwé Middelkoop	4–6, 2–6

Singles

Doubles