Juan Martin Aranguren defeated Mauricio Estivariz 6-1 6-0 in the Bolivia F2 round of 32 on clay. The upset overturned the form book — Mauricio Estivariz came in leading the head-to-head 1–0. Juan Martin Aranguren claimed a first win over Mauricio Estivariz in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-09-20 | Bolivia F1 | R32 | clay | Mauricio Estivariz | 4-6 6-3 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.