Borna Coric defeated Reilly Opelka 7-6 6-3 in the St Petersburg quarter-final on hard. The upset overturned the form book — Reilly Opelka came in ranked #115, leading the head-to-head 1–0. Borna Coric claimed a first win over Reilly Opelka in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-08-12 | Cincinnati Masters | R64 | hard | Reilly Opelka | 4-6 6-3 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 (200 vs 190). ATP, WTA & Challenger.