Barcelona is already into the Champions League Final, but the second half of the May 28th title match has yet to be decided as Manchester United host Schalke 04 in the second leg, with a 2-0 aggregate advantage.

Playing at Old Trafford, and with a two-goal advantage, Manchester United are favored to advance to play Barcelona at Wembley Stadium.

But Sir Alex Ferguson has some injury woes that might make tonight's match slightly difficult.

Forward Wayne Rooney missed training on Tuesday due to a hamstring injury, and will likely miss the match. Defender Fabio may also miss the match due a hit he took against Arsenal. Also, Ferguson might sit defender Rio Ferdinand, forward Javier Hernandez, and goalkeeper Edwin van der Sar against Schalke.

Ryan Giggs was out of action against Arsenal due to sickness and is expected back tonight. Dimitar Berbatov, Anders Lindegaard, and Darren Fletcher are expected to be available. 

Schalke received good news that two key players, Benedikt Höwedes and Klaas-Jan Huntelaar, might be available for the match.

The underdog club will be playing with nothing to lose since their fate in the Bundesliga has already been decided, and they have a major challenge facing them: scoring big against Manchester United at Old Trafford.

Schalke will need a big match from striker Raul. The veteran and former Real Madrid star didn't make his presence felt against Manchester United in the first leg.

Ferguson may be looking ahead to an upcoming match with Chelsea, and overlooking Schalke. The German club might catch an overconfident Manchester United off guard, and the same club that defeated Inter Milan by a combined score of 7-3, might make the Red Devils pay for not playing their best talent.

More than likely, Manchester United will still come out on top, as defenders Nemanja Vidic and Patrice Evra will make sure that Schalke don't muster a legitimate scoring threat.

Most eyes should be on Berbatov. The Bulgarian star has faltered in recent months, and needs to prove to Ferguson that he deserves a place in the starting 11.