Head to head
1
Hard
3
1
Clay
0
John Isner's wins on the left · Nick Kyrgios's on the right · bar lengths share one scale
All meetings (5)
| 2019 | Acapulco | Hard | SF | Nick Kyrgios | 7-5 5-7 7-6(7) |
| 2017 | Davis Cup WG QF: AUS vs USA | Hard | RR | Nick Kyrgios | 7-5 7-6(5) 7-6(5) |
| 2016 | Atlanta | Hard | F | Nick Kyrgios | 7-6(3) 7-6(4) |
| 2015 | Canada Masters | Hard | R16 | John Isner | 7-5 6-3 |
| 2015 | Madrid Masters | Clay | R16 | John Isner | 6-3 6-7(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.