Head to head
2
Hard
0
1
Clay
1
John Isner's wins on the left · Andreas Seppi's on the right · bar lengths share one scale
All meetings (4)
| 2016 | Indian Wells Masters | Hard | R64 | John Isner | 7-6(1) 6-4 |
| 2015 | Roland Garros | Clay | R128 | John Isner | 7-5 6-2 6-3 |
| 2012 | Rome Masters | Clay | R32 | Andreas Seppi | 2-6 7-6(5) 7-5 |
| 2010 | Australian Open | Hard | R128 | John Isner | 6-3 6-3 3-6 5-7 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.