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Despite the club being solid at right-back with Ignazio Abate manning the right side, the left-back position remained a difficult spot for the club to shore up in 2011-12.
Milan began the season with new signing Taye Taiwo as first choice; however, the former Marseille player quickly fell out of favour and was loaned to English side Queens Park Rangers in January. Due to Taiwo's inability to gel with the Milan team, two old heads were brought back into the team.
Luca Antonini was fantastic for much of the season, and could be called Milan's most improved defender. The Italian featured 21 times during the season but was injured for the last few weeks.
During that time and much of the year, veteran Gianluca Zambrotta deputised in the left-back or right-back positions to cover for injured personnel. That was when he wasn't hurt himself. The veteran, who most likely played his last match for the club against Novara, was adequate in his role with the club. However, his age continued to show at times of the season, lacking the legs to keep up with the quicker attackers in the league.
Abate had another solid season for the Rossoneri, and he wasn't even a defender when he broke into the first team. Thanks to manager Massimiliano Allegri, Abate learned how to defend and is one of the top full-backs in Serie A.
His 29 appearances in Serie A were good enough for third most on the team and showed not only his high fitness levels but also his importance to the team.
Djamel Mesbah was signed in January from Lecce, and some believed he would fill Milan's left-back hole. Unfortunately, he never fulfilled those expectations. Compared to the rest of the options at full-back, he didn't quite look Milan quality.
Finally, the club gave youngster Mattia De Sciglio a few run outs this season. At 19 years old, it was fantastic to see the club give the young Italian a chance. He showed promise but could use a loan spell at another Serie A club next season to get more first team experience.