Head to head
4
Clay
0
John Isner's wins on the left · Horacio Zeballos's on the right · bar lengths share one scale
All meetings (4)
| 2018 | Roland Garros | Clay | R64 | John Isner | 6-7(8) 7-6(4) 7-6(2) 6-2 |
| 2012 | Houston | Clay | R16 | John Isner | 6-7(3) 6-4 6-2 |
| 2011 | Houston | Clay | R16 | John Isner | 7-5 6-3 |
| 2010 | Rome Masters | Clay | R64 | John Isner | 4-6 7-6(5) 7-5 |
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.