Miguel Tobon defeated Martin Vassallo Arguello 6-3 2-6 6-1 in the Bolivia F1 semi-final on clay. The upset overturned the form book — Martin Vassallo Arguello came in leading the head-to-head 2–0, but Miguel Tobon had been the form player, winning 2 of their last 4 on clay. Miguel Tobon claimed a first win over Martin Vassallo Arguello in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2000-09-04 | Peru F2 | R32 | clay | Martin Vassallo Arguello | 3-6 6-0 6-0 |
| 1998-08-03 | Ecuador F1 | QF | clay | Martin Vassallo Arguello | 6-4 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.