Head to head
1
Hard
1
0
Clay
1
John Isner's wins on the left · Denis Istomin's on the right · bar lengths share one scale
All meetings (3)
| 2013 | Rome Masters | Clay | R64 | Denis Istomin | 5-7 7-6(5) 6-3 |
| 2013 | Memphis | Hard | R32 | Denis Istomin | 6-4 6-3 |
| 2009 | Indianapolis | Hard | R16 | John Isner | 6-4 6-4 |
Methodology
Head-to-head totals and surface splits exclude walkovers (no match was played), which follows ATP convention — walkover meetings still appear in the match list. The momentum chart plots the running lead across all counted meetings, oldest to newest.