Leonardo Olguin defeated Edgardo Massa 6-4 6-1 in the Argentina F3 qualifying round on clay. The upset overturned the form book — Edgardo Massa came in leading the head-to-head 2–0, but Leonardo Olguin had been the form player, winning 3 of their last 5 on clay. Leonardo Olguin claimed a first win over Edgardo Massa in three meetings, narrowing the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2001-03-19 | Argentina F2 | R16 | clay | Edgardo Massa | 1-6 6-4 6-3 |
| 1999-10-11 | Paraguay F1 | F | clay | Edgardo Massa | 6-3 6-3 |
Averages over each player's completed matches in the selected window (1 vs 24). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. Small sample — read as indicative. About