Head to head
1
Hard
0
1
Clay
0
2
Carpet
0
Luiz Mattar's wins on the left · Jaime Oncins's on the right · bar lengths share one scale
All meetings (4)
| 1992 | Sao Paulo | Hard | F | Luiz Mattar | 6-1 6-4 |
| 1992 | Maceio | Clay | R32 | Luiz Mattar | 7-6(6) 5-7 6-1 |
| 1990 | Rio de Janeiro | Carpet | R32 | Luiz Mattar | 1-6 7-5 6-1 |
| 1989 | Rio de Janeiro | Carpet | R32 | Luiz Mattar | 6-1 3-6 3-0 RET |
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.