Head to head
1
Hard
1
0
Clay
1
1
Grass
0
Michiel Schapers's wins on the left · Ricki Osterthun's on the right · bar lengths share one scale
All meetings (4)
| 1988 | Toulouse | Hard | R32 | Michiel Schapers | 4-6 6-1 6-3 |
| 1988 | Hamburg | Clay | R32 | Ricki Osterthun | 7-5 6-0 |
| 1985 | Adelaide | Grass | R32 | Michiel Schapers | 6-7 6-3 6-1 |
| 1984 | Toulouse | Hard | R16 | Ricki Osterthun | 6-2 4-0 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.