Head to head
17
Clay
2
2
Carpet
0
Guillermo Vilas's wins on the left · Jaime Fillol Sr.'s on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (21)
| 1981 | Houston WCT | Clay | R16 | Guillermo Vilas | 7-5 6-1 |
| 1979 | Davis Cup SAM F: ARG vs CHI | Clay | RR | Guillermo Vilas | 9-7 6-2 6-2 |
| 1978 | Davis Cup SAM F: CHI vs ARG | Clay | RR | Guillermo Vilas | 6-3 6-4 6-0 |
| 1977 | Buenos Aires-2 | Clay | F | Guillermo Vilas | 6-2 7-5 3-6 6-3 |
| 1977 | Santiago | Clay | F | Guillermo Vilas | 6-0 2-6 6-4 |
| 1976 | Davis Cup AME QF: BRA vs ARG | Clay | RR | Guillermo Vilas | 8-6 3-6 6-2 6-3 |
| 1976 | Buenos Aires | Clay | F | Guillermo Vilas | 6-2 6-2 6-3 |
| 1976 | Boston | Clay | R16 | Guillermo Vilas | 7-5 6-4 |
| 1976 | Toronto-2 | Clay | SF | Guillermo Vilas | 6-3 7-6 |
| 1976 | Sao Paulo WCT | Carpet | QF | Guillermo Vilas | 6-0 6-4 |
| 1976 | Mexico City WCT | Carpet | R16 | Guillermo Vilas | 6-4 6-2 |
| 1976 | Davis Cup AME SF: CHI vs ARG | Clay | RR | Guillermo Vilas | 6-3 6-1 6-2 |
| 1975 | US Open | Clay | QF | Guillermo Vilas | 6-4 6-0 6-1 |
| 1975 | Louisville | Clay | SF | Guillermo Vilas | 6-2 6-2 |
| 1975 | Washington-2 | Clay | QF | Guillermo Vilas | 6-2 6-1 |
| 1974 | Louisville | Clay | F | Guillermo Vilas | 6-4 7-5 |
| 1973 | Washington-3 | Clay | R16 | Jaime Fillol Sr. | 4-6 6-2 6-3 |
| 1973 | Davis Cup SAM F: ARG vs CHI | Clay | RR | Guillermo Vilas | 6-3 6-3 6-0 |
| 1972 | Buenos Aires | Clay | SF | Guillermo Vilas | 6-4 6-4 6-4 |
| 1970 | Washington | Clay | R32 | Jaime Fillol Sr. | 6-3 6-1 |
| 1970 | Davis Cup SAM QF: ARG vs CHI | Clay | RR | Guillermo Vilas | 7-5 6-4 3-6 6-3 |
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.