Head to head
1
Clay
3
Mike Belkin's wins on the left · Clark Graebner's on the right · bar lengths share one scale
All meetings (4)
| 1971 | Houston | Clay | SF | Clark Graebner | 6-1 3-6 7-5 4-6 6-4 |
| 1971 | Jacksonville | Clay | SF | Clark Graebner | 6-4 4-6 6-4 |
| 1968 | Milwaukee | Clay | QF | Clark Graebner | 6-1 6-1 6-2 |
| 1968 | Houston-2 | Clay | QF | Mike Belkin | 6-4 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.