Head to head
4
Hard
4
1
Clay
1
Sam Querrey's wins on the left · John Isner's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (10)
| 2022 | Indian Wells Masters | Hard | R64 | John Isner | 7-6(6) 7-6(2) |
| 2021 | Roland Garros | Clay | R128 | John Isner | 7-6(2) 6-3 6-4 |
| 2019 | Acapulco | Hard | R16 | John Isner | 6-4 6-4 |
| 2018 | Cincinnati Masters | Hard | R64 | Sam Querrey | 6-4 6-7(5) 7-6(5) |
| 2016 | Auckland | Hard | R16 | John Isner | 7-6(8) 6-7(4) 6-4 |
| 2015 | Cincinnati Masters | Hard | R64 | Sam Querrey | 6-3 7-6(3) |
| 2015 | Memphis | Hard | QF | Sam Querrey | 7-6(3) 7-6(2) |
| 2010 | Belgrade | Clay | F | Sam Querrey | 3-6 7-6(4) 6-4 |
| 2010 | Indian Wells Masters | Hard | R32 | John Isner | 7-6(3) 6-4 |
| 2010 | Memphis | Hard | F | Sam Querrey | 6-7(3) 7-6(5) 6-3 |
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.