Head to head
5
Hard
2
John Isner's wins on the left · Vasek Pospisil's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (7)
| 2022 | Dallas | Hard | QF | John Isner | 6-4 6-4 |
| 2017 | Atlanta | Hard | R16 | John Isner | 6-3 6-4 |
| 2015 | Canada Masters | Hard | R32 | John Isner | 7-6(1) 4-6 6-3 |
| 2015 | Washington | Hard | R16 | John Isner | 6-4 7-6(6) |
| 2013 | Canada Masters | Hard | R64 | Vasek Pospisil | 5-7 7-6(5) 7-6(4) |
| 2013 | San Jose | Hard | R16 | John Isner | 7-6(3) 2-6 6-3 |
| 2011 | Valencia | Hard | R32 | Vasek Pospisil | 6-3 3-6 7-6(9) |
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.