S04 got an away goal in the first match. So, despite the overall level score, Galatasaray if facing more pressure to get something going. Even so, this one is on a knife's edge, and the team that plays better today will win it. Your line-ups for that one:

For Schalke: Hildebrand, Hoewedes, Uchida, Matip, Kalasinac, Bastos, Hoeger, Drax, Neustaedter, Farfan, Pukki

For Galatasaray: Mouslera, Nounkeu, Keya, Eboue, Altintop, Inan, Melo, Riera, Sneijder, Drogba, Yilmaz

And in the other, Barca needs 2 goals to send the match to extra time. But, if Milan can score a single goal, Barca would need 4 to win, so that would pretty much end the tie. In that one:

For Milan: Abbiata, Mexes, Zapata, Abate, Boateng, Flamini, Montolivo, Constant, Abrosini, Niang, El Shaaraway

For Barca: Valdes, Mascherano, Pique, Alves, Alba, Xavi, Iniesta, Busquets, Messi, Villa, Pedro

Man, for all their recent struggles, that's still a pretty damn dangerous line-up.

Support who you want, personally I'd love to see Schalke go on but everyone has their own opinion. Mainly, just keep it relatively clean in the comments. Thanks.