Head to head
2
Hard
1
1
Clay
0
Roger Federer's wins on the left · Jan-Michael Gambill's on the right · bar lengths share one scale
All meetings (4)
| 2002 | Doha | Hard | QF | Jan-Michael Gambill | 6-4 7-5 |
| 2001 | Davis Cup WG R1: SUI vs USA | Hard | RR | Roger Federer | 7-5 6-2 4-6 6-2 |
| 2000 | Stuttgart Masters | Hard | R64 | Roger Federer | 7-6(3) 1-0 RET |
| 2000 | Roland Garros | Clay | R64 | Roger Federer | 7-6(5) 6-3 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.