Head to head
0
Hard
1
2
Clay
1
Jaime Fillol Sr.'s wins on the left · Paul Gerken's on the right · bar lengths share one scale
All meetings (4)
| 1977 | South Orange | Clay | R32 | Jaime Fillol Sr. | 6-3 7-6 |
| 1973 | Los Angeles | Hard | R32 | Paul Gerken | 7-5 6-7 7-6 |
| 1973 | Hamburg | Clay | QF | Jaime Fillol Sr. | 6-7 7-5 7-5 2-6 6-1 |
| 1972 | Indianapolis | Clay | R32 | Paul Gerken | 6-4 5-7 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.