Head to head
1
Hard
1
0
Clay
1
0
Carpet
1
Butch Walts's wins on the left · Raul Ramirez's on the right · bar lengths share one scale
All meetings (4)
| 1980 | Rome | Clay | R32 | Raul Ramirez | 6-4 6-0 |
| 1980 | Los Angeles | Hard | R32 | Butch Walts | 3-6 6-0 6-3 |
| 1977 | Palm Springs | Hard | R64 | Raul Ramirez | 6-4 6-2 |
| 1976 | Los Angeles | Carpet | R32 | Raul Ramirez | 6-2 6-1 |
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.