Head to head
1
Hard
4
1
Clay
2
1
Grass
0
Sam Querrey's wins on the left · Gilles Simon's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (9)
| 2019 | Sydney | Hard | R16 | Gilles Simon | 7-6(5) 6-7(6) 6-4 |
| 2018 | Roland Garros | Clay | R64 | Gilles Simon | 1-6 7-6(3) 6-4 6-1 |
| 2017 | US Open | Hard | R128 | Sam Querrey | 6-4 6-3 6-4 |
| 2015 | Nottingham | Grass | QF | Sam Querrey | 5-7 7-6(8) 6-4 |
| 2013 | Metz | Hard | QF | Gilles Simon | 6-4 7-6(1) |
| 2013 | Roland Garros | Clay | R32 | Gilles Simon | 2-6 6-3 2-6 7-6(2) 6-2 |
| 2010 | Beijing | Hard | R32 | Gilles Simon | 6-3 3-6 6-2 |
| 2009 | World Team Championship | Clay | RR | Sam Querrey | 7-5 6-3 |
| 2008 | Indianapolis | Hard | SF | Gilles Simon | 6-3 4-6 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.