Head to head
Rivalry summary
Jim Grabb and Jan Siemerink met 2 times on the ATP tour between 1992 and 1992. Jim Grabb leads the head-to-head 2–0 against Jan Siemerink. By surface, Grabb leads 2–0 on hard.
2
Hard
0
Jim Grabb's wins on the left · Jan Siemerink's on the right · bar lengths share one scale
All meetings (2)
| 1992 | Tokyo Outdoor | Hard | R32 | Jim Grabb | 6-7(7) 7-5 6-1 |
| 1992 | Singapore | Hard | R16 | Jim Grabb | 6-3 7-6(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.