Alexandre Simoni defeated Gabriel Keymer 6-1 6-1 in the Chile F1 semi-final on clay. The upset overturned the form book — Gabriel Keymer came in leading the head-to-head 1–0, but Alexandre Simoni had been the form player, winning 3 of their last 7 on clay. Alexandre Simoni claimed a first win over Gabriel Keymer in two meetings, levelling the head-to-head at 1–1.
Simoni A. took it in straight sets.
Alexandre Simoni beat Gabriel Keymer 6-1 6-1. Umpiry, "Alexandre Simoni vs Gabriel Keymer — Chile F1 Semi-final", https://umpiry.com/match/1999-05-10/keymer-vs-simoni-chile-f1-sf?utm_source=cite (as of 10 May 1999).