Leonardo Olguin defeated Hector Moretti 6-2 4-6 6-4 in the Bolivia Paraguay Masters 4 qualifying round on clay. The upset overturned the form book — Hector Moretti came in leading the head-to-head 1–0, but Leonardo Olguin had been the form player, winning 5 of their last 8 on clay. Leonardo Olguin claimed a first win over Hector Moretti in two meetings, levelling the head-to-head at 1–1.
Olguin L. came through in three sets.
Leonardo Olguin beat Hector Moretti 6-2 4-6 6-4. Umpiry, "Leonardo Olguin vs Hector Moretti — Bolivia Paraguay Masters 4 Qualifying Round", https://umpiry.com/match/1997-09-06/moretti-vs-olguin-bolivia-paraguay-masters-4-qf?utm_source=cite (as of 6 September 1997).