Damir Dzumhur defeated Denis Istomin 1-6 7-6 6-4 in the Nottingham round of 64 on grass. The upset overturned the form book — Denis Istomin came in leading the head-to-head 3–1, defending the title. Damir Dzumhur narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-05-31 | Roland Garros | Q1 | clay | Denis Istomin | 2-6 6-2 6-1 |
| 2021-05-25 | Roland Garros | Q128 | clay | Denis Istomin | 2-6 6-2 6-1 |
| 2018-01-01 | Brisbane | R32 | hard | Denis Istomin | 6-7 6-3 6-2 |
| 2017-08-21 | Winston-Salem | R64 | hard | Damir Dzumhur | 6-4 6-4 |
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
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About