Americo Venero Montes defeated Luis Herrera 6-3 6-4 1-6 6-3 in the PER vs MEX round robin on clay.
Venero Montes A. came through in four sets.
Americo Venero Montes beat Luis Herrera 6-3 6-4 1-6 6-3. Umpiry, "Americo Venero Montes vs Luis Herrera — PER vs MEX Round Robin", https://umpiry.com/match/1999-09-24/herrera-vs-montes-per-vs-mex-rr?utm_source=cite (as of 24 September 1999).