Mauricio Estivariz defeated Juan Martin Aranguren 4-6 6-3 7-5 in the Bolivia F1 round of 32 on clay. The upset overturned the form book — Juan Martin Aranguren came in leading the head-to-head 1–0. Mauricio Estivariz claimed a first win over Juan Martin Aranguren in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-09-27 | Bolivia F2 | R32 | clay | Juan Martin Aranguren | 6-1 6-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.