Sun Fajing (Chinese:孙发京;pinyin:Sūn Fājīng; Mandarin pronunciation: [swə́nfátɕíŋ]; born 3 October 1996) is a Chinese tennis player. Sun has a career high ATP singles ranking of world No. 197 achieved on 4 May 2026 and a career high ATP doubles ranking of world No. 181 achieved on 26 February 2024. He is the current No. 4 Chinese player.

Career

Sun made his ATP main draw debut at the 2016 Chengdu Open, where he was granted a wildcard entry in the doubles draw alongside compatriot He Yecong. They were defeated in the first round by Raven Klaasen and Rajeev Ram in straight sets.

The following year, he was again given a wildcard at the 2017 Chengdu Open with partner Te Rigele, and again he would lose in the first round to Nenad Zimonjic and Santiago Gonzalez in straight sets.

In his third main draw appearance, he and partner Zhizhen Zhang were given a wildcard entry into the doubles draw of the 2018 ATP Shenzhen Open but lost in the first round to Marcin Matkowski and Nicholas Monroe.

His fourth and most recent ATP appearance (also his third at the tournament) was a wildcard entry into the doubles draw of the 2019 Chengdu Open pairing up with Wang Aoran, and to round up an 0–4 record he lost to Dominic Inglot and Austin Krajicek.

He was given a wildcard at the 2023 China Open partnering Zhou Yi. He received a wildcard in doubles partnering Li Zhe at the 2023 Rolex Shanghai Masters and also a qualifying wildcard in singles at the 2024 Rolex Shanghai Masters where he upset fourth seed Borna Ćorić in the first round of qualifying but lost in the second in straight sets to alternate player Ramkumar Ramanathan.

Fajing Sun reached the top 200 on 19 May 2025, following his maiden Challenger title at the 2025 Wuxi Open.

Performance timeline

Key
WFSFQF#RRRQ#DNQANH

Singles

Tournament201520162017201820192020202120222023202420252026SRW–LWin%
Grand Slam tournaments
Australian OpenAAAAAAAAAAAA0 / 00–0–
French OpenAAAAAAAAAAAQ10 / 00–0–
WimbledonAAAAANHAAAAQ1A0 / 00–0–
US OpenAAAAAAAAAAQ2A0 / 00–0–
Win–loss0–00–00–00–00–00–00–00–00–00–00–00–00 / 00–0–
ATP Masters 1000
Indian Wells MastersAAAAANHAAAAAA0 / 00–0–
Miami OpenAAAAANHAAAAAA0 / 00–0–
Monte Carlo MastersAAAAANHAAAAAA0 / 00–0–
Madrid OpenAAAAANHAAAAAA0 / 00-0–
Italian OpenAAAAAAAAAAAA0 / 00–0–
Canadian OpenAAAAANHAAAAA0 / 00–0–
Cincinnati MastersAAAAAAAAAAA0 / 00–0–
Shanghai MastersQ1AQ1AQ1NHQ2Q2Q10 / 00–0–
Paris MastersAAAAAAAAAAA0 / 00–0–
Win–loss0–00–00–00–00–00–00–00–00–00–00–00 / 00–0–

ATP Challenger Tour finals

Singles: 3 (2 titles, 1 runner-up)

Finals by surface
Hard (2–1)
Clay (0–0)
ResultW–LDateTournamentTierSurfacePartnerScore
Win1–0May 2025Wuxi Open, ChinaChallengerHardAustralia Alex Bolt7–6(7–4), 6–4
Loss1–1Jul 2025Open de Tenis Ciudad de Pozoblanco, SpainChallengerHardSpain Daniel Mérida3–6, 4–6
Win2–1Apr 2026Wuning Challenger, ChinaChallengerHardAustralia Li Tu5–7, 6–4, 7–5

Doubles: 8 (5 titles, 3 runner-ups)

Finals by surface
Finals by surface Hard (5–3) Clay (0–0)
Hard (5–3)
Clay (0–0)
ResultW–LDateTournamentTierSurfacePartnerOpponentsScore
Win1–0Oct 2017Suzhou, ChinaChallengerHardChina Xin GaoChina Gong Maoxin China Zhang Ze7–6(7–5), 4–6, [10–7]
Win2–0Sep 2019Shanghai, ChinaChallengerHardChina Xin GaoAustralia Marc Polmans Australia Scott Puodziunas2–6, 6–4, [10–7]
Loss2–1Jul 2023Segovia, SpainChallengerHardPhilippines Francis Casey AlcantaraFrance Dan Added France Pierre-Hugues Herbert6–4, 3–6, [10–12]
Loss2–2Aug 2023Zhangjiagang, ChinaChallengerHardPhilippines Francis Casey AlcantaraChinese Taipei Ray Ho Australia Matthew Romios3–6, 4–6
Loss2–3Jan 2024Nonthaburi II, ThailandChallengerHardPhilippines Francis Casey AlcantaraFrance Manuel Guinard France Grégoire Jacq4–6, 6–7(6–8)
Win3–3Oct 2024Hangzhou, ChinaChallengerHardChina Te RigeleAustralia Thomas Fancutt Japan Yuta Shimizu6–3, 7–5
Win4–3Jul 2025Pozoblanco, SpainChallengerHardSpain Iñaki Montes de la TorreBulgaria Anthony Genov Israel Roy Stepanov6–1, 7–6(10–8)
Win5–3Mar 2026Yokkaichi, JapanChallengerHardChinese Taipei Wu Tung-linAustralia Ethan Cook Australia Tai Sach7–6(8–6), 6–3.

ITF Futures/World Tennis Tour finals

Singles: 20 (6 titles, 14 runner-ups)

Legend
Legend ITF Futures/WTT (6–14)Finals by surface Hard (5–13) Clay (1–1) Grass (0–0) Carpet (0–0)
ITF Futures/WTT (6–14)
Finals by surface
Hard (5–13)
Clay (1–1)
Grass (0–0)
Carpet (0–0)
ResultW–LDateTournamentTierSurfaceOpponentScore
Loss0–1Aug 2016Thailand F1, Hua HinFuturesHardChinese Taipei Chen Ti3–6, 1–6
Loss0–2Feb 2017Indonesia F1, JakartaFuturesHardChinese Taipei Chen Ti6–7(4–7), 3–6
Win1–2Apr 2017China F5, LuzhouFuturesHardAustralia Bradley Mousley7–6(7–2), 6–2
Loss1–3Mar 2018Qatar F1, DohaFuturesHardNetherlands Scott Griekspoor4–6, 3–6
Loss1–4May 2018China F6, Lu'anFuturesHardFinland Patrik Niklas-Salminen6–2, 4–6, 4–6
Loss1–5Feb 2019M15 Sharm El Sheikh, EgyptWTTHardSweden Filip Bergevi6–7(4–7), 6–7(2–7)
Win2–5May 2019M25 Lu'an, ChinaWTTHardChina Cui Jie7–5, 6–4
Loss2–6Jun 2019M25 Hengyang, ChinaWTTHardAustralia Harry Bourchier6–7(7–9), 1–6
Win3–6Jul 2019M25 Kunshan, ChinaWTTHardChinese Taipei Yang Tsung-Hua6–2, 6–2
Loss3–7Jul 2019M25 Qujing, ChinaWTTHardChina Bai Yan3–6, 1–6
Loss3–8Oct 2022M15 Monastir, TunisiaWTTHardGermany Christoph Negritu6–7(5–7), 6–7(5–7)
Win4–8Jun 2023M25 Martos, SpainWTTHardSpain Pedro Vives Marcos7–6(7–3), 6–4
Win5–8Aug 2023M25 Anning, ChinaWTTClayChina Cui Jie6–3, 4–6, 6–2
Loss5–9Aug 2023M25 Yinchuan, ChinaWTTHardChina Cui Jie3–6, 5–7
Win6–9May 2024M25 Lu'an, ChinaWTTHardChina Mo Yecong6–3, 6–1
Loss6–10May 2024M25 Baotou, ChinaWTTClay (i)China Te Rigele2–6, 4–6
Loss6–11Jul 2024M25 Tianjin, ChinaWTTHardChina Zhou Yi6–4, 3–6, 5–7
Loss6–12Aug 2024M25 Yinchuan, ChinaWTTHardChina Bai Yan4–6, 6–7(1–7)
Loss6–13Oct 2024M25 Huzhou, ChinaWTTHardChina Bai Yan3–6, 6–4, 2–6
Loss6–14Oct 2024M25 Qian Daohu, ChinaWTTHardMorocco Elliot Benchetrit3–6, 2–6

Doubles: 34 (16 titles, 18 runner-ups)

Legend
Legend ITF Futures/WTT (16–18)Finals by surface Hard (13–14) Clay (3–4) Grass (0–0) Carpet (0–0)
ITF Futures/WTT (16–18)
Finals by surface
Hard (13–14)
Clay (3–4)
Grass (0–0)
Carpet (0–0)
ResultW–LDateTournamentTierSurfacePartnerOpponentsScore
Loss0–1Feb 2016China F1, AnningFuturesClayChina Wang AoranChinese Taipei Lin Hsin Spain Enrique López Pérezwalkover
Loss0–2Jul 2016China F10, LongyanFuturesHardChina Wang AoranChina Bai Yan China Li Zhe6–7(1–7), 4–6
Win1–2Jul 2016China F11, AnningFuturesClayChina Wang AoranChina Ning Yuqing China Qiu Zhuoyang6–3, 6–4
Loss1–3Mar 2017Egypt F8, LongyanFuturesHardChinese Taipei Chen TiPhilippines Francis Casey Alcantara Zimbabwe Benjamin Lock3–6, 7–6(9–7), [7–10]
Win2–3May 2017China F8, FuzhouFuturesHardChina Te RigeleUnited States Alexander Sarkissian New Zealand Finn Tearney6–2, 6–4
Win3–3Jul 2017China F12, ShenzhenFuturesHardVietnam Lý Hoàng NamPhilippines Francis Casey Alcantara India Karunuday Singh6–4, 6–4
Loss3–4Dec 2017Thailand F12, Hua HinFuturesHardChina Xin GaoSouth Korea Chung Hong South Korea Song Min-kyu6–7(5–7), 6–3, [6–10]
Win4–4Mar 2018Qatar F3, DohaFuturesHardHong Kong Wong Chun-hunCzech Republic Matěj Vocel Czech Republic Marek Gengel6–3, 6–3
Loss4–5May 2018China F4, WuhanFuturesHardChina Wang RuikaiChina Te Rigele Japan Yuta Shimizu6–7(3-7), 3–6
Loss4–6Jun 2018China F7, LuzhouFuturesHardPhilippines Francis Casey AlcantaraGermany Sami Reinwein New Zealand Rhett Purcell5–7, 3–6
Win5–6Jun 2018China F8, YinchuanFuturesHardPhilippines Francis Casey AlcantaraThailand Wishaya Trongcharoenchaikul Japan Kento Takeuchi6–4, 2–6, [10–5]
Win6–6May 2019M25 Wuhan, ChinaWTTHardChina Te RigeleJapan Sora Fakuda Japan Yuki Mochizuki6–1, 3–6, [12–10]
Loss6–7Jun 2019M25 Luzhou, ChinaWTTHardChina Xin GaoChina Wang Aoran China Wu Hao6–3, 1–6, [7–10]
Win7–7Jul 2019M25 Kunshan, ChinaWTTHardChina Xin GaoChina Zeng Shihong China Hua Runhao6–2, 7–6(7–5)
Win8–7Jul 2019M25 Qujing, ChinaWTTHardChina Hua RunhaoPhilippines Francis Casey Alcantara New Zealand Rhett Purcell6–1, 6–1
Win9–7May 2022M25 Monastir, TunisiaWTTHardChinese Taipei Hsu Yu-hsiouAustralia Jayden Court Australia Dane Sweeny7–6(7–4), 6–3
Win10–7May 2022M25 Monastir, TunisiaWTTHardChinese Taipei Hsu Yu-hsiouAustralia Blake Bayldon Australia Jordan Smith6–4, 7–6(7–2)
Loss10–8Jun 2022M25 Chiang Rai, ThailandWTTHardChinese Taipei Hsu Yu-hsiouThailand Congsup Congcar Japan Shintaro Imai4–6, 6–1, [8–10]
Win11–8Jul 2022M15 Kottingbrunn, AustriaWTTClayGermany Niklas SchellItaly Stefano Battaglino Italy Lorenzo Rottoli6–4, 6–2
Loss11–9Oct 2022M15 Monastir, TunisiaWTTHardUnited States Bruno KuzuharaAustralia James Frawley Germany Christoph Negritu4–6, 6–1, [6–10]
Loss11–10Oct 2022M25 Jakarta, IndonesiaWTTHardJapan Seita WatanabeAustralia Thomas Fancutt Australia Brandon Walkin6–4, 3–6, [6–10]
Loss11–11Oct 2022M25 Jakarta, IndonesiaWTTHardHong Kong Coleman WongJapan Tomohiro Masabayashi Japan Seita Watanabe6–4, 4–6, [7–10]
Loss11–12Apr 2023M15 Singapore, SingaporeWTTHardPhilippines Francis Casey AlcantaraIndonesia Justin Barki Netherlands Igor Sijsling1–6, 1–6
Win12–12Apr 2023M25 Jakarta, IndonesiaWTTHardChinese Taipei Ray HoPhilippines Francis Casey Alcantara Thailand Pruchya Isaro6–4, 7–5
Win13–12Jun 2023M25 La Nucia, SpainWTTClayEgypt Amr ElsayedGreece Dimitris Sakellaridis Greece Stefanos Sakellaridis6–2, 6–3
Win14–12Jul 2023M25 Bakio, SpainWTTHardSpain John EcheverríaSwitzerland Noah Lopez France Robin Bertrand6–3, 6–2
Loss14–13Jul 2023M25 Roda de Bara, SpainWTTHardSpain John EcheverríaSpain Pedro Vives Marcos Spain Alberto Barroso Campos7–5, 3–6, [4–10]
Loss14–14Aug 2023M25 Anning, ChinaWTTClayUnited States Evan ZhuChina Cui Jie China Wang Xiaofei6–3, 2–6, [8–10]
Win15–14May 2024M25 Lu'an, ChinaWTTHardNew Zealand Ajeet RaiChina Cui Jie South Korea Lee Duck-hee6–2, 6–2
Loss15–15May 2024M25 Anning, ChinaWTTClayChina Cui JieChinese Taipei Jeffrey Hsu South Korea Woobin Shin6–2, 3–6, [5–10]
Loss15–16May 2024M25 Baotou, ChinaWTTClay (i)China Cui JieChina Te Rigele United States Evan Zhu3–6, 6–2, [6–10]
Loss15–17Jul 2024M25 Tianjin, ChinaWTTHardSouth Korea Chung Yun-seongChinese Taipei Hsu Yu-hsiou Japan Ryotaro Taguchi6–3, 3–6, [12–14]
Win16–17Oct 2024M25 Qian Daohu, ChinaWTTHardChina Te RigeleChina Zheng Baoluo Chinese Taipei Hsieh Cheng-peng6–3, 3–6, [10–3]
Loss16–18Oct 2025M25 Qian Daohu, ChinaWTTHardChina Fnu NidunjianzanUzbekistan Sergey Fomin Spain Ignasi Forcano2–6, 4–6

External links