Head to head
0
Hard
1
1
Clay
2
0
Grass
2
1
Carpet
1
Dennis Ralston'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 (8)
| 1974 | Wimbledon | Grass | R128 | Tom Okker | 6-1 6-3 4-6 6-3 |
| 1971 | Washington WCT | Clay | R16 | Dennis Ralston | 7-6 7-6 |
| 1971 | Dallas WCT | Carpet | R16 | Tom Okker | 4-6 7-5 6-2 |
| 1970 | Atlanta | Hard | F | Tom Okker | 6-4 10-8 6-2 |
| 1970 | Philadelphia | Carpet | R16 | Dennis Ralston | 6-1 6-8 6-3 |
| 1969 | Newport | Grass | F | Tom Okker | 4-6 6-5 1-0(1) |
| 1969 | Milwaukee | Clay | QF | Tom Okker | 6-0 6-0 |
| 1968 | Gstaad | Clay | SF | Tom Okker | 2-6 10-8 6-3 6-4 |
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.