Head to head
2
Hard
1
0
Clay
2
0
Grass
1
0
Carpet
3
Erik Van Dillen's wins on the left · Marty Riessen's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (9)
| 1979 | Baltimore | Carpet | R16 | Marty Riessen | 6-4 6-4 |
| 1978 | Palm Springs | Hard | R64 | Erik Van Dillen | 6-0 7-6 |
| 1977 | Australian Open-1 | Grass | R32 | Marty Riessen | 7-6 7-6 6-3 |
| 1976 | Carlsbad | Hard | R16 | Erik Van Dillen | 6-3 3-6 6-4 |
| 1975 | Los Angeles | Carpet | R32 | Marty Riessen | 6-3 7-6 |
| 1974 | Chicago | Carpet | R16 | Marty Riessen | 6-3 6-0 |
| 1973 | Washington-3 | Clay | R16 | Marty Riessen | 6-4 6-4 |
| 1971 | Charlotte | Clay | R16 | Marty Riessen | 6-3 6-4 |
| 1970 | Denver | Hard | RR | Marty Riessen | 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.