Antonio Valencia
Captain has not really had a bad season but for a player of his experience, it was sad to see him reduce himself into a one-trick pony. His form has been ropy and hasn't been able to provide an attacking outlet on the right side where United have a dearth of quality.
Valencia wasn't getting into crossing positions as much as he used to or as much as he or the team would have liked and failed to come up with the goods on more occasions than not. He has been solid defensively but that's just about it.
Marcos Rojo
Rojo was mighty impressive alongside Phil Jones in the 2016/17 campaign before he picked up an injury and took a very long time to recover. He did not regain full fitness this season and was often too indisciplined or restless at the back.
Rojo was expected to stabilize the United defence but he did anything but that. But that will change for we all know the beast he can transform into when he's on top of his game. If he gets his fitness back and is available for the length of next season, United will have one less thing to worry about.
Marouane Fellaini
United fans were taking to him finally. They had started to understand the importance of the belligerent Belgian. But then he aired his dirty laundry and played hard-ball with the club's management by maligning them for not offering him a new contract when he was taking the team past the finishing line in the 2016/17 on several occasions.
Fellaini has also had his fair share of injuries this season and has only been available intermittently. He scored the winner against Arsenal in a closely contested derby but that's the only Fellaini moment we've had this season.