Barcelona versus Atletico de Madrid, Paris Saint-Germain takes on Chelsea , and finally two old foes with exemplary Champions League pedigrees in Bayern Munich against Manchester United. Moyes will face Guardiolas all-conquering Bayern in his first ever Champions League quarterfinal. But Uniteds loss to their heated rivals was taken to heart, perhaps, and they came out to perform in their second tie against Olympiakos after being down two goals from the first leg. A Robin van Persie hat-trick, and an energized United side, saw the much-maligned club overturn their deficit ... and here we are today.