Head to head
0
Hard
1
2
Grass
0
3
Carpet
0
Clark Graebner's wins on the left · Jaime Fillol Sr.'s on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (6)
| 1972 | Baltimore | Carpet | QF | Clark Graebner | 7-5 6-1 |
| 1971 | US Open | Grass | R32 | Clark Graebner | 6-3 6-2 6-4 |
| 1971 | Hampton | Carpet | QF | Clark Graebner | 5-7 6-3 6-1 |
| 1971 | Salisbury | Carpet | QF | Clark Graebner | 1-6 6-2 6-3 |
| 1970 | Boston | Hard | R16 | Jaime Fillol Sr. | 4-6 7-5 6-3 |
| 1968 | South Orange | Grass | QF | Clark Graebner | 6-3 11-9 |
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.