Head to head
1
Hard
0
1
Grass
0
Jan Siemerink's wins on the left · Robbie Weiss's on the right · bar lengths share one scale
All meetings (2)
| 1993 | US Open | Hard | R128 | Jan Siemerink | 6-7(10) 6-4 4-6 6-3 7-6(1) |
| 1993 | Rosmalen | Grass | R32 | Jan Siemerink | 6-2 6-2 |
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.