#4 Luke Shaw
The 23-years-old left back has played every single minute for the Red Devils this season so far. In doing so he has managed to score his first senior goal for Manchester United. The defender is finally looking like he's back to his best after the double leg fracture in 2015 almost ended his career.
Shaw is known to make lightning-quick runs down the left flank and is also great at getting back in the back four formations. It has been seen this season though that he has been getting into free positions behind the opposition fullbacks, which makes him a serious threat on the left flank of the pitch.
Though he missed out on the World Cup, the confidence Mourinho has shown in him in making him the first choice left back, will definitely pay-off. And we can expect him to adjust to his tactics quickly and if he gets back to his best, he will be a key player for Red Devils and a player the opposition would definitely need to keep an eye on.