Head to head
Rivalry summary
Martin Klizan and John Isner met 2 times on the ATP tour between 2012 and 2014. Their head-to-head is level at 1–1. By surface, they are level 1–1 on hard.
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Hard
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Martin Klizan's wins on the left · John Isner's on the right · bar lengths share one scale
All meetings (2)
| 2014 | Australian Open | Hard | R128 | Martin Klizan | 6-2 7-6(6) RET |
| 2012 | Winston-Salem | Hard | R32 | John Isner | 4-6 6-3 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.