Head to head
1
Hard
1
1
Grass
0
5
Carpet
3
Tom Okker's wins on the left · Robert Lutz's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (11)
| 1977 | Wembley | Carpet | R16 | Tom Okker | 7-5 6-3 |
| 1976 | Nottingham | Grass | R16 | Tom Okker | 6-1 7-5 |
| 1976 | Rotterdam WCT | Carpet | SF | Robert Lutz | 6-4 4-6 6-4 |
| 1974 | Tucson | Hard | QF | Tom Okker | 6-3 7-5 |
| 1972 | Rotterdam WCT | Carpet | QF | Tom Okker | 6-3 6-2 |
| 1972 | Essen WCT | Carpet | QF | Robert Lutz | 2-6 6-3 6-4 |
| 1972 | Montreal WCT | Carpet | R16 | Tom Okker | 6-1 6-4 |
| 1972 | Boston WCT | Hard | F | Robert Lutz | 6-4 2-6 6-4 6-4 |
| 1971 | Cologne WCT | Carpet | SF | Robert Lutz | 7-6 1-6 6-3 |
| 1971 | Quebec WCT | Carpet | SF | Tom Okker | 6-3 3-6 7-5 |
| 1971 | Philadelphia WCT | Carpet | R16 | Tom Okker | 6-2 6-3 |
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.