Elise Mertens defeated Kristie Ahn 6-1 6-1 in the US Open round of 16 on hard. The upset overturned the form book — Kristie Ahn came in leading the head-to-head 1–0. Elise Mertens claimed a first win over Kristie Ahn in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-07-29 | San Jose | R16 | hard | Kristie Ahn | 6-3 6-3 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Per-surface Serve / Return Rating (0–100, percentile within the hard field, opponent-adjusted over 52 weeks). About
Averages over each player's completed matches in the selected window (200 vs 67). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Mertens E.: 4 days rest · 2 matches, 41 games (7d). Higher means fresher. About