Head to head
1
Hard
1
1
Clay
0
Sjeng Schalken's wins on the left · Paul Haarhuis's on the right · bar lengths share one scale
All meetings (3)
| 1999 | Boston | Hard | R32 | Sjeng Schalken | 4-6 6-3 6-0 |
| 1999 | Roland Garros | Clay | R128 | Sjeng Schalken | 6-2 6-3 4-6 6-3 |
| 1998 | Boston | Hard | QF | Paul Haarhuis | 0-6 6-4 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.