Head to head
3
Hard
0
1
Grass
1
1
Carpet
0
Roger Federer's wins on the left · Sjeng Schalken's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (6)
| 2003 | Wimbledon | Grass | QF | Roger Federer | 6-3 6-4 6-4 |
| 2003 | Miami Masters | Hard | R16 | Roger Federer | 6-3 6-2 |
| 2003 | Rotterdam | Hard | QF | Roger Federer | 6-2 6-4 |
| 2003 | Davis Cup WG R1: NED vs SUI | Carpet | RR | Roger Federer | 7-6(2) 6-4 7-5 |
| 2002 | 's-Hertogenbosch | Grass | QF | Sjeng Schalken | 3-6 7-5 6-3 |
| 2001 | US Open | Hard | R32 | Roger Federer | 6-4 7-5 7-6(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.