Mariano Delfino defeated Miguel Pastura 6-2 7-6 in the Argentina F5 semi-final on clay. The upset overturned the form book — Miguel Pastura came in leading the head-to-head 3–0. Mariano Delfino claimed a first win over Miguel Pastura in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-11-01 | Argentina F4 | R16 | clay | Miguel Pastura | 6-3 7-6 |
| 1998-10-19 | Argentina F4 | R32 | clay | Miguel Pastura | 7-6 6-4 |
| 1998-03-24 | Croatia 1 Masters 3 | R32 | clay | Miguel Pastura | 6-3 4-6 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.