John Isner defeated Stan Wawrinka 7-5 7-5 in the Belgrade semi-final on hard. John Isner extended the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2020-01-20 | Australian Open | R32 | hard | Stan Wawrinka | 6-4 4-1 RET |
| 2017-05-15 | Rome Masters | R16 | clay | John Isner | 7-6(1) 6-4 |
| 2011-11-07 | Paris Masters | R64 | hard | John Isner | 6-7(3) 7-5 7-6(5) |
| 2009-10-05 | Tokyo | R32 | hard | Stan Wawrinka | 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
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 198). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Wawrinka S.: 13 days rest · 1 match (14d). Higher means fresher. About