Head to head
1
Hard
1
1
Clay
0
1
Carpet
0
Clark Graebner's wins on the left · Ismail El Shafei's on the right · bar lengths share one scale
All meetings (4)
| 1974 | Carlsbad WCT | Hard | R32 | Clark Graebner | 7-5 7-5 |
| 1971 | Richmond | Carpet | R16 | Clark Graebner | 6-1 6-2 |
| 1970 | Salisbury | Hard | R16 | Ismail El Shafei | 12-10 6-3 |
| 1969 | Houston | Clay | R16 | Clark Graebner | 6-2 6-2 |
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.