Co-currently with Lazio struggle to win, the starting line-up was unstable. Siviglia was not call-up to the match against Bari in round 9, but returned in round 10, this time partnered with Radu in although Cribari and Diakitè also received call-up. But the experiment of Ballardini failed again, lost to Cagliari 0–1, the experiment continued in next match, a 1–1 draw with Siena in round 11. 4 days later he traveled to Spain for the European match against Villarreal, which he partnered with Diakite again and Radu moved back to fullback position, but he was substituted at half-time with Mauro Zárate in order strength the attack. Ultimately Lazio lost 1–4. Ballardini resumed the experimental Siviglia-Radu pair and the coach dislike Cribari who often collect caution, but the team lost again to Milan in round 12. Siviglia then injured again.