Ryan Harrison defeated Ivo Karlovic 4-6 7-6 7-6 in the Acapulco quarter-final on hard. The upset overturned the form book — Ivo Karlovic came in defending last year's quarter-final. Ryan Harrison extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-04-08 | Houston | R32 | clay | Ryan Harrison | 6-3 6-4 |
| 2018-02-12 | New York | R16 | hard | Ivo Karlovic | 6-4 6-4 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (200 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About