Head to head
0
Hard
2
0
Clay
2
1
Grass
2
Mario Ancic's wins on the left · Roger Federer's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (7)
| 2008 | Wimbledon | Grass | QF | Roger Federer | 6-1 7-5 6-4 |
| 2008 | Roland Garros | Clay | R32 | Roger Federer | 6-3 6-4 6-2 |
| 2006 | Wimbledon | Grass | QF | Roger Federer | 6-4 6-4 6-4 |
| 2006 | Roland Garros | Clay | QF | Roger Federer | 6-4 6-3 6-4 |
| 2005 | Miami Masters | Hard | R16 | Roger Federer | 6-3 4-6 6-4 |
| 2005 | Rotterdam | Hard | SF | Roger Federer | 7-5 6-3 |
| 2002 | Wimbledon | Grass | R128 | Mario Ancic | 6-3 7-6(2) 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.