Diego Junqueira defeated Rafael Serpa Guinazu 6-4 5-7 6-4 in the Peru F2 round of 16 on clay. The upset overturned the form book — Rafael Serpa Guinazu came in leading the head-to-head 1–0. Diego Junqueira claimed a first win over Rafael Serpa Guinazu in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2000-07-31 | Argentina F8 | R16 | clay | Rafael Serpa Guinazu | 4-6 7-5 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.