Head to head
8
Hard
1
1
Clay
0
3
Grass
1
0
Carpet
1
Roger Federer's wins on the left · Nicolas Kiefer's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (15)
| 2009 | Miami Masters | Hard | R32 | Roger Federer | 6-4 6-1 |
| 2008 | Halle | Grass | SF | Roger Federer | 6-1 6-4 |
| 2007 | Basel | Hard | QF | Roger Federer | 6-3 6-2 |
| 2007 | Madrid Masters | Hard | SF | Roger Federer | 6-4 6-4 |
| 2006 | Australian Open | Hard | SF | Roger Federer | 6-3 5-7 6-0 6-2 |
| 2005 | US Open | Hard | R16 | Roger Federer | 6-4 6-7(3) 6-3 6-4 |
| 2005 | Cincinnati Masters | Hard | R32 | Roger Federer | 4-6 6-4 6-4 |
| 2005 | Wimbledon | Grass | R32 | Roger Federer | 6-2 6-7(5) 6-1 7-5 |
| 2005 | Indian Wells Masters | Hard | QF | Roger Federer | 6-4 6-1 |
| 2004 | Roland Garros | Clay | R64 | Roger Federer | 6-3 6-4 7-6(6) |
| 2003 | Halle | Grass | F | Roger Federer | 6-1 6-3 |
| 2002 | Halle | Grass | SF | Nicolas Kiefer | 4-6 6-4 6-4 |
| 2001 | Moscow | Carpet | R32 | Nicolas Kiefer | 6-3 1-6 7-6(4) |
| 2001 | Indian Wells Masters | Hard | R64 | Nicolas Kiefer | 3-6 7-5 6-1 |
| 2000 | London | Hard | R32 | Roger Federer | 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.