Federico Abadie defeated Juan Pablo Guzman 7-6 2-6 6-3 in the Argentina 1 Masters 1 qualifying round on clay. The upset overturned the form book — Juan Pablo Guzman came in leading the head-to-head 1–0. Federico Abadie claimed a first win over Juan Pablo Guzman in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-07-31 | Argentina 2 Masters 2 | R32 | clay | Juan Pablo Guzman | 6-2 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.