Head to head
2
Hard
3
0
Clay
1
Erik Van Dillen's wins on the left · Clark Graebner's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (7)
| 1973 | Boston | Hard | R16 | Clark Graebner | 6-4 6-1 |
| 1972 | San Juan | Hard | RR | Erik Van Dillen | 7-5 3-6 6-2 |
| 1972 | Kansas City-1 | Hard | QF | Erik Van Dillen | 6-2 6-4 |
| 1971 | Indianapolis | Clay | R16 | Clark Graebner | 7-5 6-0 |
| 1970 | Berkeley | Hard | R32 | Clark Graebner | W/O |
| 1969 | Sacramento | Hard | F | Clark Graebner | 6-4 3-6 4-6 6-0 7-5 |
| 1968 | Sacramento | Hard | 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.