Head to head
1
Clay
0
2
Grass
0
4
Carpet
0
Tom Okker's wins on the left · Erik Van Dillen's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (7)
| 1977 | Wembley | Carpet | R32 | Tom Okker | 6-2 6-3 |
| 1976 | Rome WCT | Carpet | R16 | Tom Okker | 6-3 6-3 |
| 1975 | Nottingham | Grass | R32 | Tom Okker | 6-3 8-6 |
| 1974 | US Open | Grass | R128 | Tom Okker | 5-7 6-1 7-5 6-2 |
| 1973 | Charlotte WCT | Clay | R32 | Tom Okker | 2-6 6-4 6-3 |
| 1973 | Washington WCT | Carpet | R16 | Tom Okker | 6-4 6-2 |
| 1973 | Cologne WCT | Carpet | R32 | Tom Okker | 2-6 6-2 2-0 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.