John Isner defeated Denis Istomin 6-4 6-4 in the Indianapolis round of 16 on hard. The upset overturned the form book — Denis Istomin came in leading the head-to-head 2–0, but John Isner had been the form player, winning 2 of their last 5 on hard. John Isner claimed a first win over Denis Istomin in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2013-05-12 | Rome Masters | R64 | clay | Denis Istomin | 5-7 7-6(5) 6-3 |
| 2013-02-18 | Memphis | R32 | hard | Denis Istomin | 6-4 6-3 |
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