

Harriet Dart defeated Heather Watson 6-4 7-6 in the Monterrey round of 32 on hard. The result followed the form book — Harriet Dart came in ranked #131. Harriet Dart extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2026-08-28 | US Open | Q64 | hard | Harriet Dart | 6-2 4-6 1-6 |
| 2023-04-28 | W40+H Calvi | QF | hard | Heather Watson | 3-6 6-4 6-2 |
Averages over each player's completed matches in the selected window (200 vs 199). 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