Damir Dzumhur defeated Denis Istomin 6-4 6-4 in the Winston-Salem round of 64 on hard. The upset overturned the form book — Denis Istomin came in leading the head-to-head 2–1. Damir Dzumhur narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-05-31 | Roland Garros | Q1 | clay | Denis Istomin | 2-6 6-2 6-1 |
| 2018-01-01 | Brisbane | R32 | hard | Denis Istomin | 6-7(4) 6-3 6-2 |
| 2016-06-20 | Nottingham | R64 | grass | Damir Dzumhur | 1-6 7-6(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 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Dzumhur D.: 5 days rest · 2 matches, 43 games (7d). Higher means fresher. About