Head to head
0
Hard
1
0
Grass
2
Sam Groth's wins on the left · John Isner's on the right · bar lengths share one scale
All meetings (3)
| 2017 | Newport | Grass | R16 | John Isner | 6-2 6-4 |
| 2017 | Davis Cup WG QF: AUS vs USA | Hard | RR | John Isner | 7-6(5) 6-3 |
| 2016 | Davis Cup WG R1: USA vs AUS | Grass | RR | John Isner | 7-6(2) 6-2 6-2 |
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.