Joao Zwetsch defeated Miguel Kelbert 6-1 6-2 in the Brazil 2 Masters 4 round of 16 on clay.
Zwetsch J. took it in straight sets.
Joao Zwetsch beat Miguel Kelbert 6-1 6-2. Umpiry, "Joao Zwetsch vs Miguel Kelbert — Brazil 2 Masters 4 Round of 16", https://umpiry.com/match/1991-04-15/kelbert-vs-zwetsch-brazil-2-masters-4-r16?utm_source=cite (as of 15 April 1991).