# Sun Fajing

Sun Fajing (Chinese: 孙发京; pinyin: Sūn Fājīng; Mandarin pronunciation:; born 3 October 1996) is a Chinese tennis player.
Sun has a career high ATP singles ranking of world No. 320 achieved on 21 October 2024. He also has a career high ATP doubles ranking of world No. 181 achieved on 26 February 2024. He is the current No. 5 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.

## ATP Challenger Tour finals
### Doubles: 6 (3 titles, 3 runner-ups)

* Legend
* ATP Challenger Tour (3–3)
* Finals by surface
* Hard (3–3)
* Clay (0–0)
* Grass (0–0)
* Carpet (0–0)
| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
| Win | 1–0 | Oct 2017 | Suzhou, China | Challenger | Hard | Xin Gao | Gong Maoxin Zhang Ze | 7–6$^{(7–5)}$, 4–6, [10–7] |
| Win | 2–0 | Sep 2019 | Shanghai, China | Challenger | Hard | Xin Gao | Marc Polmans Scott Puodziunas | 2–6, 6–4, [10–7] |
| Loss | 2–1 | Jul 2023 | Segovia, Spain | Challenger | Hard | Francis Casey Alcantara | Dan Added Pierre-Hugues Herbert | 6–4, 3–6, [10–12] |
| Loss | 2–2 | Aug 2023 | Zhangjiagang, China | Challenger | Hard | Francis Casey Alcantara | Ray Ho Matthew Romios | 3–6, 4–6 |
| Loss | 2–3 | Jan 2024 | Nonthaburi II, Thailand | Challenger | Hard | Francis Casey Alcantara | Manuel Guinard Grégoire Jacq | 4–6, 6–7$^{(6–8)}$ |
| Win | 3–3 | Oct 2024 | Hangzhou, China | Challenger | Hard | Te Rigele | Thomas Fancutt Yuta Shimizu | 6–3, 7–5 |

## ITF Futures/World Tennis Tour finals
### Singles: 20 (6 titles, 14 runner-ups)

* Legend
* ITF Futures/WTT (6–14)
* Finals by surface
* Hard (5–13)
* Clay (1–1)
* Grass (0–0)
* Carpet (0–0)
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Loss | 0–1 | Aug 2016 | Thailand F1, Hua Hin | Futures | Hard | Chen Ti | 3–6, 1–6 |
| Loss | 0–2 | Feb 2017 | Indonesia F1, Jakarta | Futures | Hard | Chen Ti | 6–7$^{(4–7)}$, 3–6 |
| Win | 1–2 | Apr 2017 | China F5, Luzhou | Futures | Hard | Bradley Mousley | 7–6$^{(7–2)}$, 6–2 |
| Loss | 1–3 | Mar 2018 | Qatar F1, Doha | Futures | Hard | Scott Griekspoor | 4–6, 3–6 |
| Loss | 1–4 | May 2018 | China F6, Lu'an | Futures | Hard | Patrik Niklas-Salminen | 6–2, 4–6, 4–6 |
| Loss | 1–5 | Feb 2019 | M15 Sharm El Sheikh, Egypt | WTT | Hard | Filip Bergevi | 6–7$^{(4–7)}$, 6–7$^{(2–7)}$ |
| Win | 2–5 | May 2019 | M25 Lu'an, China | WTT | Hard | Cui Jie | 7–5, 6–4 |
| Loss | 2–6 | Jun 2019 | M25 Hengyang, China | WTT | Hard | Harry Bourchier | 6–7$^{(7–9)}$, 1–6 |
| Win | 3–6 | Jul 2019 | M25 Kunshan, China | WTT | Hard | Yang Tsung-Hua | 6–2, 6–2 |
| Loss | 3–7 | Jul 2019 | M25 Qujing, China | WTT | Hard | Bai Yan | 3–6, 1–6 |
| Loss | 3–8 | Oct 2022 | M15 Monastir, Tunisia | WTT | Hard | Christoph Negritu | 6–7$^{(5–7)}$, 6–7$^{(5–7)}$ |
| Win | 4–8 | Jun 2023 | M25 Martos, Spain | WTT | Hard | Pedro Vives Marcos | 7–6$^{(7–3)}$, 6–4 |
| Win | 5–8 | Aug 2023 | M25 Anning, China | WTT | Clay | Cui Jie | 6–3, 4–6, 6–2 |
| Loss | 5–9 | Aug 2023 | M25 Yinchuan, China | WTT | Hard | Cui Jie | 3–6, 5–7 |
| Win | 6–9 | May 2024 | M25 Lu'an, China | WTT | Hard | Mo Yecong | 6–3, 6–1 |
| Loss | 6–10 | May 2024 | M25 Baotou, China | WTT | Clay (i) | Te Rigele | 2–6, 4–6 |
| Loss | 6–11 | Jul 2024 | M25 Tianjin, China | WTT | Hard | Zhou Yi | 6–4, 3–6, 5–7 |
| Loss | 6–12 | Aug 2024 | M25 Yinchuan, China | WTT | Hard | Bai Yan | 4–6, 6–7$^{(1–7)}$ |
| Loss | 6–13 | Oct 2024 | M25 Huzhou, China | WTT | Hard | Bai Yan | 3–6, 6–4, 2–6 |
| Loss | 6–14 | Oct 2024 | M25 Qian Daohu, China | WTT | Hard | Elliot Benchetrit | 3–6, 2–6 |

### Doubles: 33 (16 titles, 17 runner-ups)

* Legend
* ITF Futures/WTT (16–17)
* Finals by surface
* Hard (13–13)
* Clay (3–4)
* Grass (0–0)
* Carpet (0–0)
| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score |
| Loss | 0–1 | Feb 2016 | China F1, Anning | Futures | Clay | Wang Aoran | Lin Hsin Enrique López Pérez | walkover |
| Loss | 0–2 | Jul 2016 | China F10, Longyan | Futures | Hard | Wang Aoran | Bai Yan Li Zhe | 6–7$^{(1–7)}$, 4–6 |
| Win | 1–2 | Jul 2016 | China F11, Anning | Futures | Clay | Wang Aoran | Ning Yuqing Qiu Zhuoyang | 6–3, 6–4 |
| Loss | 1–3 | Mar 2017 | Egypt F8, Longyan | Futures | Hard | Chen Ti | Francis Casey Alcantara Benjamin Lock | 3–6, 7–6$^{(9–7)}$, [7–10] |
| Win | 2–3 | May 2017 | China F8, Fuzhou | Futures | Hard | Te Rigele | Alexander Sarkissian Finn Tearney | 6–2, 6–4 |
| Win | 3–3 | Jul 2017 | China F12, Shenzhen | Futures | Hard | Lý Hoàng Nam | Francis Casey Alcantara Karunuday Singh | 6–4, 6–4 |
| Loss | 3–4 | Dec 2017 | Thailand F12, Hua Hin | Futures | Hard | Xin Gao | Chung Hong Song Min-kyu | 6–7$^{(5–7)}$, 6–3, [6–10] |
| Win | 4–4 | Mar 2018 | Qatar F3, Doha | Futures | Hard | Wong Chun-hun | Matěj Vocel Marek Gengel | 6–3, 6–3 |
| Loss | 4–5 | May 2018 | China F4, Wuhan | Futures | Hard | Wang Ruikai | Te Rigele Yuta Shimizu | 6–7$^{(3-7)}$, 3–6 |
| Loss | 4–6 | Jun 2018 | China F7, Luzhou | Futures | Hard | Francis Casey Alcantara | Sami Reinwein Rhett Purcell | 5–7, 3–6 |
| Win | 5–6 | Jun 2018 | China F8, Yinchuan | Futures | Hard | Francis Casey Alcantara | Wishaya Trongcharoenchaikul Kento Takeuchi | 6–4, 2–6, [10–5] |
| Win | 6–6 | May 2019 | M25 Wuhan, China | WTT | Hard | Te Rigele | Sora Fakuda Yuki Mochizuki | 6–1, 3–6, [12–10] |
| Loss | 6–7 | Jun 2019 | M25 Luzhou, China | WTT | Hard | Xin Gao | Wang Aoran Wu Hao | 6–3, 1–6, [7–10] |
| Win | 7–7 | Jul 2019 | M25 Kunshan, China | WTT | Hard | Xin Gao | Zeng Shihong Hua Runhao | 6–2, 7–6$^{(7–5)}$ |
| Win | 8–7 | Jul 2019 | M25 Qujing, China | WTT | Hard | Hua Runhao | Francis Casey Alcantara Rhett Purcell | 6–1, 6–1 |
| Win | 9–7 | May 2022 | M25 Monastir, Tunisia | WTT | Hard | Hsu Yu-hsiou | Jayden Court Dane Sweeny | 7–6$^{(7–4)}$, 6–3 |
| Win | 10–7 | May 2022 | M25 Monastir, Tunisia | WTT | Hard | Hsu Yu-hsiou | Blake Bayldon Jordan Smith | 6–4, 7–6$^{(7–2)}$ |
| Loss | 10–8 | Jun 2022 | M25 Chiang Rai, Thailand | WTT | Hard | Hsu Yu-hsiou | Congsup Congcar Shintaro Imai | 4–6, 6–1, [8–10] |
| Win | 11–8 | Jul 2022 | M15 Kottingbrunn, Austria | WTT | Clay | Niklas Schell | Stefano Battaglino Lorenzo Rottoli | 6–4, 6–2 |
| Loss | 11–9 | Oct 2022 | M15 Monastir, Tunisia | WTT | Hard | Bruno Kuzuhara | James Frawley Christoph Negritu | 4–6, 6–1, [6–10] |
| Loss | 11–10 | Oct 2022 | M25 Jakarta, Indonesia | WTT | Hard | Seita Watanabe | Thomas Fancutt Brandon Walkin | 6–4, 3–6, [6–10] |
| Loss | 11–11 | Oct 2022 | M25 Jakarta, Indonesia | WTT | Hard | Coleman Wong | Tomohiro Masabayashi Seita Watanabe | 6–4, 4–6, [7–10] |
| Loss | 11–12 | Apr 2023 | M15 Singapore, Singapore | WTT | Hard | Francis Casey Alcantara | Justin Barki Igor Sijsling | 1–6, 1–6 |
| Win | 12–12 | Apr 2023 | M25 Jakarta, Indonesia | WTT | Hard | Ray Ho | Francis Casey Alcantara Pruchya Isaro | 6–4, 7–5 |
| Win | 13–12 | Jun 2023 | M25 La Nucia, Spain | WTT | Clay | Amr Elsayed | Dimitris Sakellaridis Stefanos Sakellaridis | 6–2, 6–3 |
| Win | 14–12 | Jul 2023 | M25 Bakio, Spain | WTT | Hard | John Echeverría | Noah Lopez Robin Bertrand | 6–3, 6–2 |
| Loss | 14–13 | Jul 2023 | M25 Roda de Bara, Spain | WTT | Hard | John Echeverría | Pedro Vives Marcos Alberto Barroso Campos | 7–5, 3–6, [4–10] |
| Loss | 14–14 | Aug 2023 | M25 Anning, China | WTT | Clay | Evan Zhu | Cui Jie Wang Xiaofei | 6–3, 2–6, [8–10] |
| Win | 15–14 | May 2024 | M25 Lu'an, China | WTT | Hard | Ajeet Rai | Cui Jie Lee Duck-hee | 6–2, 6–2 |
| Loss | 15–15 | May 2024 | M25 Anning, China | WTT | Clay | Cui Jie | Jeffrey Chuan En Hsu Woobin Shin | 6–2, 3–6, [5–10] |
| Loss | 15–16 | May 2024 | M25 Baotou, China | WTT | Clay (i) | Cui Jie | Te Rigele Evan Zhu | 3–6, 6–2, [6–10] |
| Loss | 15–17 | Jul 2024 | M25 Tianjin, China | WTT | Hard | Chung Yun-seong | Hsu Yu-hsiou Ryotaro Taguchi | 6–3, 3–6, [12–14] |
| Win | 16–17 | Oct 2024 | M25 Qian Daohu, China | WTT | Hard | Te Rigele | Zheng Baoluo Hsieh Cheng-peng | 6–3, 3–6, [10–3] |