Fullbacks
Diogo Dalot
Mourinho already revealed to reporters that Dalot would start this match. His reasoning is that he wanted to ease the 19-year-old into high-pressure matches especially in the Premier League. This presents the perfect chance for Dalot to show the home fans his quality.
He impressed on his debut in the Champions League against Young Boys. He is quick and likes to deliver dangerous crosses into the box. Dalot also has good ball control and can recover on the other end. Mourinho has praised him on a consistent basis and this is a player who can give Antonio Valencia competition for his place at the right wing.
Ashley Young
Even though Luke Shaw has commanded the left back position, Ashley Young is likely to start this one to offer leadership and his experience. A player who has seen almost everything that the game has to offer played as a winger before making a switch.
Young can spot a pass, deliver quality crosses and score if the opportunity comes. The fullback positions is probably an area that United have comprehensively covered with several options. Matteo Darmian can also be drafted as cover in either full back position.