damn refeerer he was offside :/
In certain camera angles, Khedira was offside but in some angles, he wasn't. Can't blame the referee for such a difficult decision. Don't forget it's live action and no camera replays are allowed.
Camp Nou's terrain are also the largest in Europe; not the ideal one to judge such a crowded and tight position. Sincerely, it's 50% for me - in some angle, Mascherano being in extension seems to cover Khedira but in some, he does not. The main fault is Puyol's defending; not the referee in my eyes. Puyol should have blasted the ball away immediately; instead of protecting the ball for Valdes.
So, it's 1-0 at Half-Time. For now, it's a deserving lead. Let's see who gets the upper hand.