I am a big fan of Marchisio but he really failed over the two legs, not for his lack of grit (the whole team lacked the drive). But for not playing to his strengths as a clever player, he needed to used his movement to make himself available to Pirlo as a quick option who himself was very bad but surely wasn't helped by the fact his only two options were to pass forwards or backwards, not dimension to the game = no ideas.