Qian Sun defeated Tianhui Zhang 7-6 5-7 6-2 in the M15 Tianjin 4 round of 32 on hard. The upset overturned the form book — Tianhui Zhang came in ranked #723, leading the head-to-head 2–0. Qian Sun claimed a first win over Tianhui Zhang in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2026-08-19 | M15 Maanshan 7 | R32 | hard | Tianhui Zhang | 6-2 6-7 4-6 |
| 2025-05-22 | M15 Luan 5 | R16 | hard | Tianhui Zhang | 6-4 6-2 |
Averages over each player's completed matches in the selected window (66 vs 67). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About