Heather Watson defeated Tatjana Maria 6-3 7-6 in the Toronto qualifying round 2 on hard. The upset overturned the form book — Tatjana Maria came in ranked #76. Heather Watson extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2023-06-12 | Nottingham | R16 | grass | Heather Watson | 6-4 6-4 |
| 2020-03-02 | Monterrey | R32 | hard | Tatjana Maria | 7-6(4) 3-6 7-5 |
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 (199 vs 200). ATP, WTA & Challenger.