Head to head
7
Hard
6
Gael Monfils'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 (13)
| 2021 | Canada Masters | Hard | QF | John Isner | 7-6(5) 6-4 |
| 2019 | Beijing | Hard | R32 | John Isner | 6-4 6-7(5) 6-3 |
| 2018 | Vienna | Hard | R16 | Gael Monfils | 6-4 6-4 |
| 2018 | Indian Wells Masters | Hard | R64 | Gael Monfils | 6-7(5) 7-6(3) 7-5 |
| 2017 | Indian Wells Masters | Hard | R32 | Gael Monfils | 6-2 6-4 |
| 2014 | Paris Masters | Hard | R32 | Gael Monfils | 6-4 7-6(4) |
| 2013 | US Open | Hard | R64 | John Isner | 7-5 6-2 4-6 7-6(4) |
| 2011 | Washington | Hard | SF | Gael Monfils | 6-4 3-6 7-6(6) |
| 2010 | Montpellier | Hard | QF | Gael Monfils | 3-6 6-4 6-4 |
| 2010 | Australian Open | Hard | R32 | John Isner | 6-1 4-6 7-6(4) 7-6(5) |
| 2009 | Indian Wells Masters | Hard | R64 | John Isner | 6-7(5) 6-1 6-4 |
| 2008 | Miami Masters | Hard | R128 | Gael Monfils | 6-7(8) 6-3 6-3 |
| 2007 | Washington | Hard | SF | John Isner | 6-7(4) 7-6(1) 7-6(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.