Kai Lin Zhang defeated Riko Sawayanagi 1-6 6-3 6-4 in the Bangkok $25K qualifying round on hard. The upset overturned the form book — Riko Sawayanagi came in leading the head-to-head 2–0. Kai Lin Zhang claimed a first win over Riko Sawayanagi in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-09-28 | Zhuhai $50K | R16 | hard | Riko Sawayanagi | 7-5 6-4 |
| 2014-06-23 | Xi'an 50K | R16 | hard | Riko Sawayanagi | 6-2 6-2 |
Averages over each player's completed matches in the selected window (107 vs 82). 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