Martin Vassallo Arguello defeated Albert Portas 6-1 6-1 in the Vina del Mar round robin on clay. The upset overturned the form book — Albert Portas came in leading the head-to-head 2–1, defending last year's round of 32. Martin Vassallo Arguello narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-02-18 | Costa Do Sauipe | Q32 | hard | Albert Portas | 6-4 2-1 |
| 2005-02-14 | Costa Do Sauipe | QF | hard | Martin Vassallo Arguello | 4-6 6-3 6-2 |
| 2004-08-09 | Sopot | R32 | clay | Albert Portas | 6-1 6-2 |
Averages over each player's completed matches in the selected window (92 vs 3). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About