Head to head
1
Hard
4
0
Grass
1
0
Carpet
4
Raymond Moore's wins on the left · Tom Okker's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (10)
| 1980 | Basel | Hard | QF | Tom Okker | 6-1 7-5 |
| 1975 | Paris | Hard | SF | Tom Okker | 6-3 6-0 6-3 |
| 1973 | Paris | Hard | R32 | Tom Okker | 6-2 6-2 |
| 1973 | Washington WCT | Carpet | QF | Tom Okker | 6-4 6-4 |
| 1973 | London WCT | Carpet | R16 | Tom Okker | 6-0 6-3 |
| 1970 | London-1 | Carpet | R16 | Tom Okker | 6-4 8-6 |
| 1969 | Newport | Grass | RR | Tom Okker | 6-3 6-4 |
| 1969 | Japanese Championships | Carpet | RR | Tom Okker | 6-4 6-4 |
| 1968 | Bloemfontein | Hard | R16 | Tom Okker | 6-1 6-4 |
| 1968 | Cape Town-1 | Hard | R16 | Raymond Moore | 6-0 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.