Head to head
4
Hard
0
1
Grass
1
1
Carpet
1
Jan-Michael Gambill'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 (9)
| 2003 | Madrid Masters | Hard | R32 | Jan-Michael Gambill | 7-6(6) 6-2 |
| 2002 | Queen's Club | Grass | R16 | Sjeng Schalken | 7-6(4) 1-6 6-4 |
| 2002 | Milan | Carpet | R32 | Sjeng Schalken | 7-5 3-6 6-3 |
| 2001 | Washington | Hard | R16 | Sjeng Schalken | W/O |
| 2001 | Canada Masters | Hard | R64 | Jan-Michael Gambill | 6-1 6-4 |
| 2001 | Milan | Carpet | R32 | Jan-Michael Gambill | 6-1 6-7(3) 6-2 |
| 1999 | Cincinnati Masters | Hard | R64 | Jan-Michael Gambill | 4-6 6-3 6-4 |
| 1998 | Wimbledon | Grass | R128 | Jan-Michael Gambill | 7-6(6) 6-4 6-7(5) 4-6 8-6 |
| 1997 | Auckland | Hard | R32 | Jan-Michael Gambill | 6-2 7-6(7) |
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.