Albert Montanes defeated Martin Vassallo Arguello 2-6 6-4 6-2 in the Sopot quarter-final on clay. The upset overturned the form book — Martin Vassallo Arguello came in leading the head-to-head 1–0, defending last year's round of 16. Albert Montanes claimed a first win over Martin Vassallo Arguello in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2009-02-16 | Buenos Aires | R32 | clay | Martin Vassallo Arguello | 6-2 6-3 |
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 (200 vs 91). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About