Head to head
1
Hard
0
1
Clay
0
Peter McNamara's wins on the left · John Marks's on the right · bar lengths share one scale
All meetings (2)
| 1979 | Gstaad | Clay | R16 | Peter McNamara | 6-0 6-2 |
| 1978 | Sydney-1 | Hard | R32 | Peter McNamara | 7-6 6-1 |
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.