2011: Turned pro

Nedunchezhiyan turned pro in year 2011.

2017: First ATP doubles title

Nedunchezhiyan won his first ATP World Tour level title at the 2017 Aircel Chennai Open. He won the title with partner Rohan Bopanna by defeating a pair of compatriots, Purav Raja and Divij Sharan, in an all Indian final.^[4] As a result he broke into the top 100 at world No. 86 on 9 January 2017.

2023: First Major win at Australian Open, Third ATP final

He reached his third ATP final at the 2023 Tata Open Maharashtra with compatriot N.Sriram Balaji as an alternate pair.^[5] They defeated compatriots Purav Raja and Divij Sharan in straight sets in first round. In the quarterfinals, they upset second seeds Nathaniel Lammons and Jackson Withrow in straight sets winning both sets in a tiebreak. Next they defeated British pair of Jack Cash and Henry Patten in the semifinals in straight sets to reach their first ATP Tour final as a team. Despite not losing a single set on their way to final they were defeated in straight sets by Sander Gillé and Joran Vliegen in the final. He won his first Grand Slam doubles match at the 2023 Australian Open with Balaji defeating fifth seeds Ivan Dodig and Austin Krajicek as an alternate pair. He entered the main draw of the 2023 French Open also as an alternate pair with Balaji.

Doubles: 3 (1 title, 2 runner-ups)

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Win	1–0	Jan 2017	Chennai Open, India	250 Series	Hard	Rohan Bopanna	Purav Raja Divij Sharan	6–3, 6–4
Loss	1–1	Sep 2018	Chengdu Open, China	250 Series	Hard	Austin Krajicek	Ivan Dodig Mate Pavić	2–6, 4–6
Loss	1–2	Jan 2023	Maharashtra Open, India	250 Series	Hard	Sriram Balaji	Sander Gillé Joran Vliegen	4–6, 4–6

Singles: 14 (7–7)

Result	W–L	Date	Tournament	Tier	Surface	Opponent	Score
Loss	0–1	Jul 2007	India F6, Chennai	Futures	Clay	Vijay Kannan	6–0, 3–6, 5–7
Win	1–1	Nov 2011	India F10, Pune	Futures	Hard	Vishnu Vardhan	6–4, 7–5
Win	2–1	Dec 2011	India F12, Kolkata	Futures	Clay	Sriram Balaji	6–2, 6–1
Win	3–1	Apr 2012	India F5, Madurai	Futures	Clay	Marc Giner	4–6, 6–1, 7–6(7–4)
Win	4–1	Oct 2012	India F13, Mumbai	Futures	Hard	Mate Pavić	6–1, 6–1
Loss	4–2	Mar 2013	India F1, Chennai	Futures	Clay	Victor Crivoi	6–7(3–7), 5–7
Loss	4–3	Jun 2013	India F7, Chennai	Futures	Hard	Sriram Balaji	7–6(8–6), 4–6, 0–6
Win	5–3	Jun 2013	India F8, Coimbatore	Futures	Hard	Vijayant Malik	6–2, 5–1 ret.
Loss	5–4	Aug 2013	Gabon F1, Libreville	Futures	Hard	James McGee	6–1, 6–4
Loss	5–5	Aug 2013	Gabon F2, Libreville	Futures	Hard	Arthur Surreaux	6–4, 4–6, 5–7
Loss	5–6	Oct 2013	Nigeria F2, Lagos	Futures	Hard	Ante Pavić	4–6, 3–6
Loss	5–7	Jun 2014	Guam F1, Tumon	Futures	Hard	Takuto Niki	7–6(8–6), 2–6, 5–7
Win	6–7	Mar 2015	India F2, Bhimavaram	Futures	Hard	David Pérez Sanz	7–6(9–7), 6–1
Win	7–7	Sep 2015	India F12, Chennai	Futures	Hard	Prajnesh Gunneswaran	7–6(10–8), 6–4

Doubles: 53 (31–22)

Result	W–L	Date	Tournament	Tier	Surface	Partner	Opponents	Score
Win	1–0	Jul 2007	India F6, Chennai	Futures	Clay	Vivek Shokeen	Sriram Balaji Vijay Sundar Prashanth	7–5, 6–4
Loss	1–1	Dec 2011	India F12, Kolkata	Futures	Clay	Vijay Sundar Prashanth	Sriram Balaji Vinayak Sharma Kaza	3–6, 6–4, [3–10]
Win	2–1	Apr 2012	India F4, Trichy	Futures	Clay	Vijay Sundar Prashanth	Rupesh Roy Vivek Shokeen	7–6(7–3), 6–7(5–7), [10–7]
Win	3–1	Jun 2012	India F9, Bangalore	Futures	Hard	Ranjeet Virali-Murugesan	Sriram Balaji Arun-Prakash Rajagopalan	4–6, 6–3, [10–7]
Loss	3–2	Dec 2012	Cambodia F2, Phnom Penh	Futures	Hard	Gao Wan	Marcus Daniell Richard Gabb	1–6, 6–7(5–7)
Win	4–2	Dec 2012	India F15, Davanagere	Futures	Hard	Sriram Balaji	Vijay Sundar Prashanth Arun-Prakash Rajagopalan	6–7(4–7), 6–4, [10–1]
Loss	4–3	Mar 2013	India F1, Chennai	Futures	Clay	Sriram Balaji	Arata Onozawa Arun-Prakash Rajagopalan	4–6, 6–0, [7–10]
Win	5–3	Jun 2013	India F6, Chennai	Futures	Hard	Sriram Balaji	Toshihide Matsui Bumpei Sato	6–1, 6–4
Win	6–3	Jun 2013	India F7, Chennai	Futures	Hard	Sriram Balaji	Keith-Patrick Crowley Arun-Prakash Rajagopalan	6–2, 6–7(6–8), [10–5]
Win	7–3	Aug 2013	Gabon F1, Libreville	Futures	Hard	Vishnu Vardhan	Sam Barry Elie Rousset	6–2, 6–7(6–8), [10–5]
Loss	7–4	Aug 2013	Gabon F2, Libreville	Futures	Hard	Vishnu Vardhan	Sam Barry Elie Rousset	0–6, 0–6
Win	8–4	Sep 2013	Burundi F1, Bujumbura	Futures	Clay	Yannick Mertens	Mark Fynn Hassan Ndayishimiye	6–3, 6–2
Win	9–4	Nov 2013	India F10, Bhopal	Futures	Hard	Purav Raja	Daniiar Duldaev Karunuday Singh	6–3, 6–3
Win	10–4	Mar 2014	India F3, Chennai	Futures	Clay	Vishnu Vardhan	Sriram Balaji Ranjeet Virali-Murugesan	7–6(7–1), 6–3
Win	11–4	Aug 2014	Gabon F1, Libreville	Futures	Hard	Sam Barry	Mark Fynn Ruan Roelofse	6–2, 6–2
Win	12–4	Aug 2014	Gabon F2, Libreville	Futures	Hard	Sam Barry	Mark Fynn Ruan Roelofse	7–6(7–5), 6–3
Win	13–4	Oct 2014	Kazakhstan F12, Shymkent	Futures	Clay	Enrique López Pérez	Yurii Dzhavakian Olexiy Kolisnyk	7–5, 6–0
Win	14–4	Oct 2014	Kazakhstan F13, Shymkent	Futures	Clay	Enrique López Pérez	Aleksandar Lazov Aleksandre Metreveli	6–3, 6–3
Win	15–4	Nov 2014	India F7, Raipur	Futures	Hard	Vishnu Vardhan	Vinayak Sharma Kaza Vijay Sundar Prashanth	2–6, 6–3, [10–6]
Win	1–0	Feb 2015	Kolkata, India	Challenger	Hard	Somdev Devvarman	James Duckworth Luke Saville	w/o
Win	16–4	Mar 2015	India F1, Chandigarh	Futures	Hard	Vijay Sundar Prashanth	Enrique López Pérez David Pérez Sanz	6–3, 6–4
Loss	16–5	Apr 2015	Indonesia F3, Jakarta	Futures	Hard	Danai Udomchoke	Toshihide Matsui Christopher Rungkat	4–6, 2–6
Loss	16–6	May 2015	Nigeria F1, Abuja	Futures	Hard	Matija Pecotić	Deiton Baughman Eric Quigley	1–6, 4–6
Win	17–6	May 2015	Nigeria F2, Abuja	Futures	Hard	Matija Pecotić	Keith-Patrick Crowley Tucker Vorster	6–4, 3–6, [10–4]
Win	18–6	May 2015	Guam F1, Tumon	Futures	Hard	Yuichi Ito	Masakatsu Noguchi Masaki Sasai	2–6, 6–3, [10–7]
Win	19–6	Aug 2015	India F11, Chennai	Futures	Hard	Vijay Sundar Prashanth	Mohit Mayur Jayaprakash Vinayak Sharma Kaza	6–4, 7–6(7–5)
Win	20–6	Sep 2015	India F12, Chennai	Futures	Hard	Vijay Sundar Prashanth	Markos Kalovelonis Timur Khabibulin	4–6, 6–3, [10–4]
Loss	1–1	Mar 2016	Shenzhen, China	Challenger	Hard	Saketh Myneni	Luke Saville Jordan Thompson	6–3, 4–6, [10–12]
Win	2–1	Apr 2016	Nanjing, China	Challenger	Clay	Saketh Myneni	Denys Molchanov Aleksandr Nedovyesov	6–3, 6–3
Win	3–1	May 2016	Karshi, Uzbekistan	Challenger	Hard	Enrique López Pérez	Aleksandre Metreveli Dmitry Popko	6–1, 6–4
Loss	3–2	Oct 2016	Ho Chi Minh City, Vietnam	Challenger	Hard	Ramkumar Ramanathan	Sanchai Ratiwatana Sonchat Ratiwatana	5–7, 4–6
Loss	3–3	Nov 2016	Kobe, Japan	Challenger	Hard (i)	Christopher Rungkat	Daniel Masur Ante Pavić	6–4, 3–6, [6–10]
Loss	3–4	Nov 2016	Toyota, Japan	Challenger	Carpet (i)	Christopher Rungkat	Matt Reid John-Patrick Smith	3–6, 4–6
Loss	3–5	Feb 2017	Dallas, USA	Challenger	Hard (i)	Christopher Rungkat	David O'Hare Joe Salisbury	7–6(8–6), 3–6, [9–11]
Win	4–5	May 2017	Ostrava, Czech Republic	Challenger	Clay	Franko Škugor	Rameez Junaid Lukáš Rosol	6–3, 6–2
Loss	4–6	Oct 2017	Ningbo, China	Challenger	Hard	Christopher Rungkat	Radu Albot Jose Statham	5–7, 3–6
Loss	4–7	Nov 2017	Kobe, Japan	Challenger	Hard (i)	Christopher Rungkat	Ben McLachlan Yasutaka Uchiyama	6–4, 3–6, [8–10]
Win	5–7	Feb 2018	Dallas, USA	Challenger	Hard (i)	Christopher Rungkat	Leander Paes Joe Salisbury	6–4, 3–6, [10–7]
Loss	5–8	Mar 2018	Lille, France	Challenger	Hard	Purav Raja	Hugo Nys Tim Pütz	6–7(3–7), 6–1, [7–10]
Loss	5–9	Apr 2018	Tallahassee, USA	Challenger	Clay	Enrique López Pérez	Robert Galloway Denis Kudla	3–6, 1–6
Loss	5–10	May 2018	Savannah, USA	Challenger	Clay	Enrique López Pérez	Luke Bambridge Akira Santillan	2–6, 2–6
Loss	5–11	Jun 2018	Nottingham, Great Britain	Challenger	Grass	Austin Krajicek	Frederik Nielsen Joe Salisbury	6–7(5–7), 1–6
Win	6–11	Jun 2018	Ilkley, Great Britain	Challenger	Grass	Austin Krajicek	Kevin Krawietz Andreas Mies	6–3, 6–3
Win	7–11	Jul 2018	Winnetka, USA	Challenger	Hard	Austin Krajicek	Roberto Maytín Christopher Rungkat	6–7(4–7), 6–4, [10–5]
Win	8–11	Oct 2018	Monterrey, Mexico	Challenger	Hard	Marcelo Arévalo	Leander Paes Miguel Ángel Reyes-Varela	6–1, 6–4
Loss	8–12	Nov 2018	Shenzhen, China	Challenger	Hard	Sriram Balaji	Hsieh Cheng-peng Christopher Rungkat	4–6, 2–6
Win	9–12	Oct 2021	Lisbon, Portugal	Challenger	Clay	Purav Raja	Nuno Borges Francisco Cabral	7–6(7–5), 6–3
Loss	9–13	Nov 2021	Tenerife, Spain	Challenger	Hard	Purav Raja	Nuno Borges Francisco Cabral	3–6, 4–6
Win	10–13	Jun 2022	Bratislava, Slovakia	Challenger	Clay	Sriram Balaji	Vladyslav Manafov Oleg Prihodko	7–6(8–6), 6–4
Win	11–13	Jun 2022	Blois, France	Challenger	Clay	Sriram Balaji	Romain Arneodo Jonathan Eysseric	6–4, 6–7(3–7), [10–7]
Loss	11–14	Sep 2022	Braga, Portugal	Challenger	Clay	Christopher Rungkat	Vít Kopřiva Jaroslav Pospíšil	6–3, 3–6, [4–10]
Loss	11–15	Nov 2022	Temuco, Chile	Challenger	Hard	Luis David Martínez	Guido Andreozzi Guillermo Durán	4–6, 2–6
Loss	11–16	May 2023	Skopje, North Macedonia	Challenger	Clay	Sriram Balaji	Petr Nouza Andrew Paulson	6–7(5–7), 3–6