Martin Vassallo Arguello defeated Oscar Hernandez 2-6 6-4 6-4 in the Palermo round of 16 on clay. The upset overturned the form book — Oscar Hernandez came in defending last year's round of 16. Martin Vassallo Arguello extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-05-10 | Madrid Masters | R64 | clay | Oscar Hernandez | 6-3 6-3 |
| 2009-02-02 | Vina del Mar | R32 | clay | Martin Vassallo Arguello | 6-3 7-6(1) |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (106 vs 135). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About