Head to head
1
Hard
1
1
Clay
1
1
Carpet
0
Jaime Fillol Sr.'s wins on the left · Thomaz Koch's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (12)
| 1979 | Davis Cup SAM SF: BRA vs CHI | RR | Thomaz Koch | 7-5 6-3 1-6 6-3 | |
| 1979 | Bogota | Clay | R16 | Thomaz Koch | 6-0 6-4 |
| 1976 | Buenos Aires | Clay | SF | Jaime Fillol Sr. | 6-2 6-1 |
| 1975 | Philadelphia WCT | Carpet | R64 | Jaime Fillol Sr. | W/O |
| 1975 | Davis Cup SAM F: CHI vs BRA | RR | Jaime Fillol Sr. | 6-2 7-5 8-6 | |
| 1972 | Davis Cup SAM F: BRA vs CHI | RR | Thomaz Koch | 6-1 4-6 6-2 6-3 | |
| 1971 | Davis Cup SAM F: CHI vs BRA | RR | Thomaz Koch | 6-3 6-2 6-2 | |
| 1971 | Washington-1 | Carpet | F | Jaime Fillol Sr. | 6-1 3-6 6-4 6-7 6-4 |
| 1970 | Davis Cup SAM SF: BRA vs CHI | RR | Thomaz Koch | 6-1 6-3 4-6 4-6 8-6 | |
| 1969 | Davis Cup SAM F: CHI vs BRA | RR | Thomaz Koch | 6-4 2-6 4-6 6-2 7-5 | |
| 1969 | San Juan | Hard | R16 | Jaime Fillol Sr. | 6-4 3-6 6-3 |
| 1969 | Caracas | Hard | QF | Thomaz Koch | 6-0 6-2 |
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.