Head to head
1
Hard
4
1
Clay
2
1
Grass
0
Jack Sock'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 (9)
| 2021 | Atlanta | Hard | R16 | John Isner | 7-6(6) 6-4 |
| 2016 | Paris Masters | Hard | QF | John Isner | 7-6(6) 4-6 6-4 |
| 2016 | Houston | Clay | SF | Jack Sock | 7-6(4) 6-3 |
| 2015 | Basel | Hard | R16 | Jack Sock | 7-6(5) 6-3 |
| 2014 | Atlanta | Hard | SF | John Isner | 7-5 6-4 |
| 2014 | Newport | Grass | QF | Jack Sock | 6-4 7-6(4) |
| 2014 | Nice | Clay | R16 | John Isner | 6-4 6-3 |
| 2013 | Houston | Clay | R16 | John Isner | 7-5 6-7(3) 7-6(3) |
| 2012 | Atlanta | Hard | QF | John Isner | 7-6(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.