Head to head
1
Hard
0
1
Clay
0
Clark Graebner's wins on the left · Barry MacKay's on the right · bar lengths share one scale
All meetings (2)
| 1970 | Cincinnati | Clay | R32 | Clark Graebner | 6-3 6-4 |
| 1968 | Los Angeles-2 | Hard | R64 | Clark Graebner | 7-9 6-3 6-4 |
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.