Head to head
2
Hard
0
0
Clay
1
0
Grass
1
1
Carpet
1
Jan Siemerink's wins on the left · Boris Becker's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (7)
| 1998 | Monte Carlo Masters | Clay | R64 | Boris Becker | 5-7 6-3 6-1 |
| 1997 | Stockholm | Hard | R16 | Jan Siemerink | 7-6(6) 6-7(3) 6-3 |
| 1996 | Vienna | Carpet | F | Boris Becker | 6-4 6-7(7) 6-2 6-3 |
| 1995 | Basel | Hard | SF | Jan Siemerink | W/O |
| 1995 | Cincinnati Masters | Hard | R32 | Jan Siemerink | 7-5 7-6(7) |
| 1995 | Wimbledon | Grass | R32 | Boris Becker | 2-6 6-2 6-2 6-4 |
| 1992 | Stuttgart Indoor | Carpet | R16 | Jan Siemerink | 6-3 6-4 |
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.