Head to head
0
Hard
1
1
Grass
0
1
Carpet
0
Clark Graebner's wins on the left · Jim Osborne's on the right · bar lengths share one scale
All meetings (3)
| 1971 | Columbus | Hard | R16 | Jim Osborne | 7-6 6-4 |
| 1970 | Hampton | Carpet | R32 | Clark Graebner | 6-1 12-10 |
| 1968 | South Orange | Grass | SF | Clark Graebner | 6-3 1-6 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.