Antonio Baldellou Esteva defeated Jose Checa Calvo 6-2 6-3 in the Spain 2 4 qualifying round on clay. The upset overturned the form book — Jose Checa Calvo came in leading the head-to-head 6–2. Antonio Baldellou Esteva narrowed the head-to-head to 6–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-05-15 | Spain F15 | R32 | clay | Antonio Baldellou Esteva | 6-3 4-0 |
| 2006-04-03 | Turkey 1 2 | F | clay | Jose Checa Calvo | 6-4 6-3 |
| 2006-04-03 | Turkey 1 3 | SF | clay | Jose Checa Calvo | 6-2 6-2 |
| 2006-04-03 | Turkey 1 4 | SF | clay | Jose Checa Calvo | 6-2 6-4 |
| 2006-02-27 | Spain 1 3 | R16 | clay | Antonio Baldellou Esteva | 7-5 7-5 |
| 2006-02-27 | Spain 1 4 | R16 | clay | Jose Checa Calvo | 3-6 6-1 6-2 |
| 2004-04-12 | Turkey 1 1 | F | clay | Jose Checa Calvo | 6-4 6-2 |
| 2004-04-12 | Turkey 1 2 | R16 | clay | Jose Checa Calvo | 6-4 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.