Luis Andreotti defeated Fabian Blengino 4-6 6-4 6-2 in the Argentina 1 Masters 3 qualifying round on clay. The upset overturned the form book — Fabian Blengino came in leading the head-to-head 2–1. Luis Andreotti narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-10-21 | Bolivia Chile Masters 3 | R16 | clay | Fabian Blengino | 6-1 6-2 |
| 1991-03-18 | Brazil 1 Masters 1 | R32 | clay | Luis Andreotti | 6-0 6-4 |
| 1991-03-18 | Brazil 1 Masters 2 | SF | clay | Fabian Blengino | 7-5 6-1 |