Yu Chang defeated Shuichi Sekiguchi 6-3 6-4 in the Japan F3 qualifying round on hard. The upset overturned the form book — Shuichi Sekiguchi came in leading the head-to-head 1–0. Yu Chang claimed a first win over Shuichi Sekiguchi in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-04-10 | China F5 | R32 | hard | Shuichi Sekiguchi | 6-1 7-5 |
Averages over each player's completed matches in the selected window (1 vs 200). 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. Small sample — read as indicative. About