Pablo Bianchi defeated Rafael Serpa Guinazu 3-5 4-2 4-2 1-4 4-2 in the Agentina F9 qualifying round on clay. The upset overturned the form book — Rafael Serpa Guinazu came in leading the head-to-head 1–0. Pablo Bianchi claimed a first win over Rafael Serpa Guinazu in two meetings, levelling the head-to-head at 1–1.
Bianchi P. came through in five sets.
Pablo Bianchi beat Rafael Serpa Guinazu 3-5 4-2 4-2 1-4 4-2. Umpiry, "Pablo Bianchi vs Rafael Serpa Guinazu — Agentina F9 Qualifying Round", https://umpiry.com/match/2000-08-07/bianchi-vs-guinazu-agentina-f9-qf?utm_source=cite (as of 7 August 2000).