Start Juan Mata
Manchester United are having a 100% win record whenever Mata is deployed in the starting berth and that is what Mourinho needs to consider. Mata is in a fine form this season and is easily an upgrade for Rooney, hence, Mourinho needs to be careful while picking up the squad. He may not be the threat while playing on the wings, but is a pure venom while playing as number 1o.
Last but not least, this guy’s been one of the lone bright spots in Manchester United this season, even if he hasn’t had a lot of playing time to contribute for Mourinho’s side so far, but he’s more than capable to make an instant impact for the red devils when given the chance.
Start Michael Carrick
Ironically, Fellaini’s injury could actually be a great boost for the Red Devils, as the Belgian’s been having an awful season, and they could definitely use the talent of the veteran midfielder, who’s more than capable to put some order in that messy centre of the pitch.
Mourinho’s been reluctant to start the 35-year-old, as he doesn’t seem to trust the legs of an ageing man. However, in the four matches that Carrick has stepped up, he’s shown that he still has a lot to offer for his team, and they’re going to need all the help they can get if they want to slow down a really good Arsenal side.