Line-ups confirmed at the Nou Camp

Barça's starting line-up: Valdés, Alves, Piqué, Mascherano, Alba, Busquets, Xavi, Iniesta, Pedro, Villa and Messi. #FCBLive

From @FCBarcelona on Twitter: ( 6:42 pm, Tue 12 Mar 2013)

#ACMilan XI (4-3-1-2) v #Barcelona: Abbiati; Abate, Mexes, Zapata, Constant; Montolivo, Ambrosini, Flamini; Boateng; Niang, El Shaarawy #UCL

From @Sport_360 on Twitter: ( 6:43 pm, Tue 12 Mar 2013)

Carles Puyol has suffered a knee injury so Javier Mascherano slots into the Barcelona defence alongside Gerard Pique and Dani Alves. Those of you hoping to see Mario Balotelli turn out for AC Milan - we're afraid he's cup-tied. Sad face.