Head to head
1
Hard
0
1
Clay
1
2
Grass
0
0
Carpet
1
Tom Okker's wins on the left · Pierre Barthes's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (6)
| 1974 | Munich WCT | Carpet | R32 | Pierre Barthes | 6-3 RET |
| 1969 | Atlanta | Hard | QF | Tom Okker | 6-3 6-4 |
| 1969 | Queen's Club | Grass | R32 | Tom Okker | 6-2 6-2 |
| 1969 | Roland Garros | Clay | R64 | Tom Okker | 6-3 6-0 6-4 |
| 1968 | US Open | Grass | R32 | Tom Okker | 6-2 13-11 7-5 |
| 1968 | Hamburg | Clay | R16 | Pierre Barthes | 7-5 6-1 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.