Dustin Brown defeated Denis Istomin 7-5 6-4 in the Stuttgart qualifying round 1 on grass. The upset overturned the form book — Denis Istomin came in leading the head-to-head 2–1, defending last year's quarter-final. Dustin Brown narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-05-27 | Roland Garros | Q1 | clay | Dustin Brown | 7-6(5) 6-1 |
| 2017-07-24 | Gstaad | R16 | clay | Denis Istomin | 6-3 6-1 |
| 2010-06-07 | Queen's Club | R32 | grass | Denis Istomin | 7-6(7) 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 (63 vs 169). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About