Usue Maitane Arconada defeated Kristie Ahn 6-4 7-6 in the Monterrey qualifying round 1 on hard. The upset overturned the form book — Kristie Ahn came in leading the head-to-head 2–0, but Usue Maitane Arconada had been the form player, winning 3 of their last 8 on hard. Usue Maitane Arconada claimed a first win over Kristie Ahn in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-07-18 | W60 Berkeley | R16 | hard | Kristie Ahn | 7-5 6-2 |
| 2019-02-23 | W25 Rancho Santa Fe | SF | hard | Kristie Ahn | 6-1 6-1 |
Averages over each player's completed matches in the selected window (122 vs 27). 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