Head to head
1
Hard
4
1
Clay
1
0
Grass
1
Marin Cilic'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 (8)
| 2022 | Roland Garros | Clay | R32 | Marin Cilic | 6-0 6-3 6-2 |
| 2018 | Pune | Hard | SF | Gilles Simon | 1-6 6-3 6-2 |
| 2016 | Miami Masters | Hard | R32 | Gilles Simon | 6-3 6-7(4) 6-3 |
| 2014 | US Open | Hard | R16 | Marin Cilic | 5-7 7-6(3) 6-4 3-6 6-3 |
| 2014 | Australian Open | Hard | R64 | Gilles Simon | 4-6 7-6(3) 6-7(5) 6-1 6-2 |
| 2008 | Canada Masters | Hard | QF | Gilles Simon | 3-6 6-2 6-3 |
| 2007 | Umag | Clay | R16 | Gilles Simon | 7-5 2-6 6-3 |
| 2007 | Wimbledon | Grass | R128 | Gilles Simon | 3-6 7-5 6-4 4-6 6-3 |
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.