Head to head
1
Hard
2
0
Clay
1
Bjorn Phau's wins on the left · Roger Federer's on the right · bar lengths share one scale
All meetings (4)
| 2012 | US Open | Hard | R64 | Roger Federer | 6-2 6-3 6-2 |
| 2010 | Estoril | Clay | R16 | Roger Federer | 6-3 6-4 |
| 2007 | Australian Open | Hard | R128 | Roger Federer | 7-5 6-0 6-4 |
| 1999 | Washington | Hard | R64 | Bjorn Phau | 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.