Patricio Arquez defeated Edgardo Massa 6-4 6-2 in the Bolivia F2 round of 32 on clay. The upset overturned the form book — Edgardo Massa came in leading the head-to-head 1–0. Patricio Arquez claimed a first win over Edgardo Massa in two meetings, levelling the head-to-head at 1–1.
Arquez P. took it in straight sets.
Patricio Arquez beat Edgardo Massa 6-4 6-2. Umpiry, "Patricio Arquez vs Edgardo Massa — Bolivia F2 Round of 32", https://umpiry.com/match/1999-09-27/arquez-vs-massa-bolivia-f2-r32?utm_source=cite (as of 27 September 1999).