Head to head
Rivalry summary
Jan Siemerink and Wally Masur met 2 times on the ATP tour between 1993 and 1995. Their head-to-head is level at 1–1. By surface, they are level 1–1 on hard.
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Hard
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Jan Siemerink's wins on the left · Wally Masur's on the right · bar lengths share one scale
All meetings (2)
| 1995 | Hong Kong | Hard | R32 | Jan Siemerink | 6-4 6-4 |
| 1993 | Tokyo Outdoor | Hard | R16 | Wally Masur | 6-7(4) 6-4 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.