Sun Fajing

Sun Fajing (; ; 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

Singles

ATP Challenger Tour finals

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

Finals by surfaceHard (2–1)Clay (0–0)

Doubles: 8 (5 titles, 3 runner-ups) Finals by surfaceHard (5–3)Clay (0–0)

ITF Futures/World Tennis Tour finals

Singles: 20 (6 titles, 14 runner-ups) LegendITF Futures/WTT (6–14)Finals by surfaceHard (5–13)Clay (1–1)Grass (0–0)Carpet (0–0)

Doubles: 34 (16 titles, 18 runner-ups) LegendITF Futures/WTT (16–18)Finals by surfaceHard (13–14)Clay (3–4)Grass (0–0)Carpet (0–0)