Michael Carrick.Manchester United's caretaker boss will lead the team for the first time against Villarreal in the Champions League on Tuesday night, just 72 hours after being told he would take be taking over from Ole Gunnar Solskjaer.The rookie manager has some big decisions to make for the trip to Spain - and we're not talking about what to pack in his hand luggage.United are not yet guaranteed of qualification from Group F and require all three points against Unai Emery's side who are hot on their heels in second spot.Daily Star Sport take a look at four huge decisions Carrick must make when selecting his first line-up as United boss.
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