Nicolas Almagro defeated Igor Andreev 6-3 7-5 in the Buenos Aires quarter-final on clay. The upset overturned the form book — Igor Andreev came in leading the head-to-head 4–3, defending last year's round of 32. Nicolas Almagro narrowed the head-to-head to 4–4.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-01-17 | Australian Open | R64 | hard | Nicolas Almagro | 7-5 2-6 4-6 7-6(10) 7-5 |
| 2008-04-20 | Monte Carlo Masters | R16 | clay | Igor Andreev | 7-5 4-6 6-4 |
| 2006-01-16 | Australian Open | R128 | hard | Igor Andreev | 7-5 6-4 6-3 |
| 2005-09-26 | Palermo | R32 | clay | Igor Andreev | 6-4 2-6 6-4 |
| 2005-07-25 | Kitzbuhel | R32 | clay | Nicolas Almagro | 6-3 6-2 |
| 2005-05-02 | Rome Masters | R64 | clay | Nicolas Almagro | 3-6 6-4 6-1 |
| 2005-03-21 | Miami Masters | R128 | hard | Igor Andreev | 7-6(4) 2-6 7-6(12) |
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 28). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About