Head to head
1
Hard
1
1
Clay
0
2
Grass
0
2
Carpet
2
Stan Smith's wins on the left · Raul Ramirez's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (9)
| 1981 | Frankfurt WCT | Carpet | QF | Stan Smith | 4-6 6-4 6-3 |
| 1980 | Frankfurt WCT | Carpet | QF | Stan Smith | 6-3 6-4 |
| 1977 | Nottingham | Grass | QF | Stan Smith | 6-0 6-4 |
| 1976 | Louisville | Clay | QF | Stan Smith | 3-6 6-3 6-1 |
| 1975 | Davis Cup AME PR: USA vs MEX | Hard | RR | Raul Ramirez | 3-6 6-4 6-1 8-6 |
| 1974 | Carlsbad WCT | Hard | SF | Stan Smith | 6-3 4-6 6-4 |
| 1974 | St. Petersburg WCT | Carpet | QF | Raul Ramirez | 7-5 5-7 6-4 |
| 1974 | Philadelphia WCT | Carpet | R32 | Raul Ramirez | 7-6(5) 3-6 7-6(5) |
| 1971 | US Open | Grass | R128 | Stan Smith | 6-0 6-2 7-6 |
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.