Head to head
7
Hard
1
0
Clay
1
1
Grass
0
Roger Federer'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)
| 2019 | Laver Cup | Hard | RR | Roger Federer | 6-4 7-6(3) |
| 2019 | Miami Masters | Hard | F | Roger Federer | 6-1 6-4 |
| 2018 | Laver Cup | Hard | RR | Roger Federer | 6-7(5) 7-6(6) 1-0(7) |
| 2015 | Paris Masters | Hard | R16 | John Isner | 7-6(3) 3-6 7-6(5) |
| 2015 | US Open | Hard | R16 | Roger Federer | 7-6(0) 7-6(6) 7-5 |
| 2012 | London Olympics | Grass | QF | Roger Federer | 6-4 7-6(5) |
| 2012 | Indian Wells Masters | Hard | F | Roger Federer | 7-6(7) 6-3 |
| 2012 | Davis Cup WG R1: SUI vs USA | Clay | RR | John Isner | 4-6 6-3 7-6(4) 6-2 |
| 2010 | Shanghai Masters | Hard | R32 | Roger Federer | 6-3 6-4 |
| 2007 | US Open | Hard | R32 | Roger Federer | 6-7(4) 6-2 6-4 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.