Head to head
1
Hard
3
0
Clay
1
0
Carpet
2
Cliff Richey'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 (7)
| 1976 | Philadelphia WCT | Carpet | R64 | Tom Okker | 6-4 7-6(5) |
| 1974 | Las Vegas | Hard | R16 | Tom Okker | 6-4 6-7 6-0 |
| 1972 | Vancouver WCT | Carpet | R16 | Tom Okker | 7-6 6-0 |
| 1971 | Berkeley WCT | Hard | QF | Tom Okker | 3-6 6-2 6-2 |
| 1969 | Las Vegas | Hard | R16 | Cliff Richey | 6-3 6-4 |
| 1969 | Roland Garros | Clay | R16 | Tom Okker | 9-7 6-3 6-3 |
| 1969 | Johannesburg | Hard | QF | Tom Okker | 3-6 6-3 6-4 8-6 |
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.