Head to head
3
Hard
1
0
Grass
4
Gilles Simon's wins on the left · Juan Martin del Potro's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (8)
| 2018 | Wimbledon | Grass | R16 | Juan Martin del Potro | 7-6(1) 7-6(5) 5-7 7-6(5) |
| 2016 | Stuttgart | Grass | QF | Juan Martin del Potro | 6-7(3) 6-3 6-0 |
| 2013 | Marseille | Hard | QF | Gilles Simon | 6-4 6-3 |
| 2012 | London Olympics | Grass | R16 | Juan Martin del Potro | 6-1 4-6 6-3 |
| 2011 | US Open | Hard | R32 | Gilles Simon | 4-6 7-6(5) 6-2 7-6(3) |
| 2011 | Wimbledon | Grass | R32 | Juan Martin del Potro | 7-6(8) 7-6(5) 7-5 |
| 2008 | US Open | Hard | R32 | Juan Martin del Potro | 6-4 6-7(4) 6-1 3-6 6-3 |
| 2007 | New Haven | Hard | R32 | Gilles Simon | 7-6(3) 6-7(5) 7-5 |
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.