Head to head
0
Hard
1
1
Clay
0
Jan Siemerink's wins on the left · Johan Van Herck's on the right · bar lengths share one scale
All meetings (2)
| 1998 | Davis Cup WG R1: BEL vs NED | Clay | RR | Jan Siemerink | 6-4 6-3 4-6 6-1 |
| 1995 | Toulouse | Hard | R32 | Johan Van Herck | 4-5 RET |
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.