Barcelona vs AC Milan Live Streaming ,Barcelona vs AC Milan Live Stream , Watch Live Barcelona vs AC Milan Streaming , Barcelona vs AC Milan 2012 Live Stream , Watch Barcelona vs AC Milan Free Streaming, Barcelona vs AC Milan Online Video, Barcelona face a huge task in Tuesday night's Champions League last-16 clash with AC Milan as they aim to become the first team ever to overcome a 2-0 first-leg deficit since the competition's format changed in 1992. The Camp Nou is expected to host a thrilling encounter as Barcelona, who collapsed at the San Siro three weeks ago, look to advance through to the quarter-finals in a bid to claim their fifth Champions League title. Milan, who expertly thwarted Lionel Messi and Co with a defensive masterclass in the first-leg, are expected to come under relentless pressure as reports from Spain hint towards a more fluid, attacking setup for the home side.   Some in Catalonia have suggested that, with Barca needing to score at least twice to progress, manager Tito Vilanova and his assistant Jordi Roura could decide on a three-man back-line, with captain Carles Puyol left on the bench. Asked about the different tactical options available at Monday's pre-game press conference, Roura suggested the team could change shape mid-game if the situation required it, while centre-half Gerard Pique said there were pros and cons to playing a three-man defence. "There are advantages and disadvantages to playing with three at the back," Pique said. "It is a decision for Tito and Jordi. We are used to playing one way or the other. With 3-4-3 we are more attacking, but we suffer more at the back. With 4-3-3 we control the game better, but we lack that (No. 10) mediapunta. We will see." Former AC Milan coach Arrigo Sacchi said in a webchat with El Pais readers on Monday that Barca's main problem looked physical rather tactical.