Andrey Golubev defeated Denis Istomin 6-4 6-1 in the Hamburg quarter-final on clay. The upset overturned the form book — Denis Istomin came in leading the head-to-head 2–0. Andrey Golubev claimed a first win over Denis Istomin in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-09-16 | St. Petersburg | R16 | carpet | Denis Istomin | 4-6 6-3 6-4 |
| 2009-09-21 | Metz | R32 | hard | Denis Istomin | 6-2 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