Head to head
Rivalry summary
John Isner and Denis Istomin met 3 times on the ATP tour between 2009 and 2013. Denis Istomin leads the head-to-head 2–1 against John Isner. By surface, they are level 1–1 on hard.
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Hard
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0
Clay
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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.