Wishaya Trongcharoenchaikul defeated Hiroyasu Ehara 6-3 6-2 in the Vietnam F4 qualifying round on hard. The upset overturned the form book — Hiroyasu Ehara came in leading the head-to-head 2–1, but Wishaya Trongcharoenchaikul had been the form player, winning 3 of their last 9 on hard. Wishaya Trongcharoenchaikul narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-07-17 | China F13 | QF | hard | Hiroyasu Ehara | 1-6 6-2 7-5 |
| 2017-05-22 | Singapore F1 | SF | hard | Hiroyasu Ehara | 6-2 2-1 |
| 2016-09-19 | Vietnam F5 | R32 | hard | Wishaya Trongcharoenchaikul | 7-6(5) 6-3 |
Averages over each player's completed matches in the selected window (200 vs 40). 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