Natthasith Kunsuwan defeated Xian Yao Zhou 7-6 6-3 in the M15 Tianjin 4 q16 on hard. The upset overturned the form book — Xian Yao Zhou came in leading the head-to-head 1–0, but Natthasith Kunsuwan had been the form player, winning 5 of their last 10 on hard. Natthasith Kunsuwan claimed a first win over Xian Yao Zhou in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-10-26 | M15 Monastir 41 | Q32 | hard | Xian Yao Zhou | 6-3 7-6(6) |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.