Paulo Carvallo defeated Matias Oneille 7-5 6-4 in the Bolivia F2 qualifying round on clay. The upset overturned the form book — Matias Oneille came in leading the head-to-head 1–0. Paulo Carvallo claimed a first win over Matias Oneille in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-07-26 | Uruguay F2 | R32 | clay | Matias Oneille | 6-2 6-1 |