Martin Vassallo Arguello defeated Patricio Rudi 7-6 4-6 6-0 in the Brazil F1 round of 32 on clay. The upset overturned the form book — Patricio Rudi came in leading the head-to-head 3–0, but Martin Vassallo Arguello had been the form player, winning 1 of their last 4 on clay. Martin Vassallo Arguello claimed a first win over Patricio Rudi in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2000-05-01 | Chile F6 | R16 | clay | Patricio Rudi | 2-6 7-6(5) 6-2 |
| 1999-07-31 | Argentina 2 Masters 3 | QF | clay | Patricio Rudi | 6-3 7-5 |
| 1998-10-12 | Argentina F3 | R32 | clay | Patricio Rudi | 5-7 6-1 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.