Antonio Pastorino defeated Carlos Berlocq 3-6 6-2 6-4 in the Argentina 3 round of 32 on clay. The upset overturned the form book — Carlos Berlocq came in leading the head-to-head 5–1. Antonio Pastorino narrowed the head-to-head to 5–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-08-30 | Argentina F4 | QF | clay | Carlos Berlocq | 6-2 7-5 |
| 2004-05-10 | Argentina F3 | SF | clay | Carlos Berlocq | 6-1 6-1 |
| 2004-05-03 | Argentina F2 | SF | clay | Carlos Berlocq | 6-2 6-3 |
| 2003-11-03 | Argentina F6 | R16 | clay | Carlos Berlocq | 6-3 6-4 |
| 2002-07-01 | Chile F3 | SF | clay | Carlos Berlocq | 7-5 6-3 |
| 2001-06-18 | Italy 3 2 | QF | clay | Antonio Pastorino | 6-1 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.