Siviglia started the 2009–10 season by winning Internazionale at 2009 Supercoppa Italiana. As he had only 1-year contract left with Lazio and aged 36, he became less active as starting XI partially due to injury and the coach failed to fine the best central pair. Siviglia and Cribari at first were the starting central back under the new coach Davide Ballardini. He played both legs of UEFA Europa League play-off round but replaced by Aleksandar Kolarov in the 23 minutes on 27 August 2009. He was suffered muscle problem.