Daniel Garza defeated Rodrigo Antonio Grilli 7-6 6-2 in the USA F20 qualifying round on hard. The upset overturned the form book — Rodrigo Antonio Grilli came in leading the head-to-head 2–1. Daniel Garza narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-10-30 | Mexico F20 | QF | hard | Rodrigo Antonio Grilli | 3-6 6-2 6-2 |
| 2004-08-09 | USA F23 | R32 | hard | Daniel Garza | 6-2 3-6 6-4 |
| 2004-05-10 | Mexico F6 | R32 | hard | Rodrigo Antonio Grilli | 6-1 2-6 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.