Oscar Bustos defeated Otavio Della 7-6 6-2 in the Brazil 1 Masters 4 round of 32 on clay.
Bustos O. took it in straight sets.
Oscar Bustos beat Otavio Della 7-6 6-2. Umpiry, "Oscar Bustos vs Otavio Della — Brazil 1 Masters 4 Round of 32", https://umpiry.com/match/1991-03-18/bustos-vs-della-brazil-1-masters-4-r32?utm_source=cite (as of 18 March 1991).