Head to head
0
Hard
1
1
Clay
0
Marty Riessen's wins on the left · Terry Ryan's on the right · bar lengths share one scale
All meetings (2)
| 1973 | Louisville | Clay | R64 | Marty Riessen | 6-1 6-2 |
| 1970 | Johannesburg | Hard | R32 | Terry Ryan | 4-6 6-3 6-2 7-5 |
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.