Antonio Prieto defeated Carlos Zwetsch 6-2 6-2 in the Brazil 4 Masters 4 round of 16 on clay. The result followed the form book — Antonio Prieto came in leading the head-to-head 1–0. Antonio Prieto extended the head-to-head to 2–0.
Prieto A. took it in straight sets.
Antonio Prieto beat Carlos Zwetsch 6-2 6-2. Umpiry, "Antonio Prieto vs Carlos Zwetsch — Brazil 4 Masters 4 Round of 16", https://umpiry.com/match/1997-10-25/prieto-vs-zwetsch-brazil-4-masters-4-r16?utm_source=cite (as of 25 October 1997).