 Complete the following phrase:  Recalled for 200910, Valera also suffered initially with physical problems. However, he would manage to appear regularly for Atlético over the course of the campaign  more than 30 official matches  mainly as a right back, competing with internationals Luis Perea and Tomáš Ujfaluši for the position. He contributed with seven games in the Colchoneros Europa League victorious run, although only three complete, including the 12 away defeat against Liverpool in the semi-finals 22 aggregate win; he also featured one minute in 