Petra Rampre defeated Chieh Yu Hsu 6-1 7-5 in the Las Cruces NM 25K qualifying round on hard. The upset overturned the form book — Chieh Yu Hsu came in leading the head-to-head 2–0, but Petra Rampre had been the form player, winning 1 of their last 5 on hard. Petra Rampre claimed a first win over Chieh Yu Hsu in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-05-11 | Raleigh NC $25K | R16 | clay | Chieh Yu Hsu | 6-0 6-4 |
| 2013-09-16 | Albuquerque NM 75K | QF | hard | Chieh Yu Hsu | 7-5 6-0 |
Averages over each player's completed matches in the selected window (3 vs 18). 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