Roberto Alvarez defeated Marcello Wowk 6-3 6-1 in the Argentina F4 round of 32 on clay. The result followed the form book — Roberto Alvarez came in leading the head-to-head 3–0. Roberto Alvarez extended the head-to-head to 4–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-10-18 | Paraguay F2 | R16 | clay | Roberto Alvarez | 6-3 6-4 |
| 1997-11-01 | Uruguay Masters 1 | R32 | clay | Roberto Alvarez | 6-7 6-3 6-0 |
| 1997-11-01 | Uruguay Masters 4 | R16 | clay | Roberto Alvarez | 6-4 6-2 |