Head to head
3
Hard
1
3
Clay
1
2
Grass
0
2
Carpet
2
Marty Riessen's wins on the left · Ismail El Shafei's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (14)
| 1973 | Boston | Hard | R32 | Marty Riessen | 6-1 7-5 |
| 1973 | Copenhagen WCT | Carpet | R32 | Marty Riessen | 6-4 3-6 6-3 |
| 1972 | Essen WCT | Carpet | R16 | Ismail El Shafei | 6-2 6-2 |
| 1972 | Vancouver WCT | Carpet | R16 | Marty Riessen | 6-3 6-3 |
| 1972 | Montreal WCT | Carpet | QF | Ismail El Shafei | 7-6 7-6 |
| 1971 | Washington WCT | Clay | QF | Marty Riessen | 6-1 6-7 6-2 |
| 1970 | Tucson | Hard | R16 | Marty Riessen | 6-3 6-0 |
| 1970 | Los Angeles-2 | Hard | R32 | Marty Riessen | 6-3 6-7 6-3 |
| 1970 | Newport-2 | Grass | RR | Marty Riessen | 6-3 2-6 1-0(2) |
| 1970 | Toronto | Clay | R16 | Marty Riessen | 6-3 1-6 6-2 |
| 1970 | Dublin | Grass | QF | Marty Riessen | 9-11 6-3 6-2 |
| 1970 | St. Louis | Hard | R16 | Ismail El Shafei | 8-6 8-6 |
| 1969 | Berlin | Clay | R16 | Marty Riessen | 6-3 6-4 3-6 2-6 6-1 |
| 1969 | Rome | Clay | R32 | Ismail El Shafei | 2-6 6-2 6-4 1-6 6-4 |
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.