Giggsy.

[Rockman]

He started out showing signs of rust and then improved tremedously.
Mata can be Rooney,which means Rooney can focus on being the striker.
Kagawa has to play at some point in the game as he will likely have to start in the City game.
Chicarito is the quintessential sub,so Welback starts.
Rio and whoever in CD,bench Fellaini,Rafaeland Young.

[Assasin]

you really joking. how can Mata replace Rooney? Mata can't tackle, Mata can't cover the ground that Rooney cover, and he can't strike the ball as Rooney. Mata can only replace Kagawa and Gigs in my team or sit on the bench. Man you need Rooney to drop back sometimes either in center mid or or as a second striker.

[Rockman]

In the CL game, Rooney looked more as a midfielder(Mata)servicing RvP,the disconnect between Mata and the strikers could be bridged because of the hard work of Giggsy.