The big game today is Bayern Munich versus Real Madrid, but maybe you're more interested in Charlton vs. Watford or Birmingham vs. Wigan in the Championship. I'm not going to say that being more interested in the latter two games is wrong, but it certainly isn't right.
Bayern Munich line up like this:
Bayern Munich XI: Neuer - Dante, Ribéry, Mandzukić, Robben, Boateng, Lahm, Müller, Alaba, Schweinsteiger, Kroos— ESPN FC (@ESPNFC) April 29, 2014
And Real Madrid send out this team:
BBC back together. Real Madrid XI: Casillas, Pepe, Ramos, Coentrão, Ronaldo, Benzema, Bale, Alonso, Carvajal, Modric, Di María— ESPN FC (@ESPNFC) April 29, 2014
Real Madrid won the first leg, so Bayern need to win 1-0 to force penalties or win by multiple goals in order to advance. Our fearless leader wrote up a much better summary of what to expect and the key matchups in this match, which you can find here.