Head to head
1
Hard
1
1
Grass
0
Clark Graebner's wins on the left · Robert Maud's on the right · bar lengths share one scale
All meetings (3)
| 1970 | Beckenham | Grass | F | Clark Graebner | 6-4 10-8 |
| 1968 | Johannesburg-1 | Hard | QF | Clark Graebner | 6-3 6-4 6-3 |
| 1968 | Durban-1 | Hard | R16 | Robert Maud | 7-5 1-6 10-8 7-5 |
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.