Head to head
1
Hard
2
1
Clay
1
0
Grass
1
0
Carpet
1
Geoff Masters'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 (7)
| 1980 | Rancho Mirage | Hard | R64 | Geoff Masters | 6-3 7-6 |
| 1980 | San Juan | Hard | R32 | Jaime Fillol Sr. | 6-3 2-6 6-3 |
| 1977 | Las Vegas | Hard | R32 | Jaime Fillol Sr. | 6-3 7-6 |
| 1976 | Toronto-2 | Clay | R32 | Jaime Fillol Sr. | 6-1 6-3 |
| 1974 | San Francisco | Carpet | R64 | Jaime Fillol Sr. | 3-6 6-0 6-4 |
| 1974 | Boston | Clay | R32 | Geoff Masters | 7-5 3-6 6-3 |
| 1972 | Wimbledon | Grass | R64 | Jaime Fillol Sr. | 4-6 8-6 7-5 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.