Carlos Engel defeated Carlos Zwetsch 2-6 6-4 6-3 in the Brazil 1 Masters 4 round of 32 on clay. The result followed the form book — Carlos Engel came in leading the head-to-head 1–0. Carlos Engel extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-09-02 | Brazil 6 Masters 4 | SF | clay | Carlos Engel | 6-4 3-6 7-6 |