Matias Oneille defeated Diego Alvarez 6-4 2-6 7-6 in the Paraguay F1 round of 32 on clay. The upset overturned the form book — Diego Alvarez came in leading the head-to-head 1–0, but Matias Oneille had been the form player, winning 5 of their last 10 on clay. Matias Oneille claimed a first win over Diego Alvarez in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2002-07-22 | Italy 5 2 | R32 | clay | Diego Alvarez | 6-1 5-7 6-4 |