#4 Aaron Wan-Bissaka
With Antonio Valencia's departure from Old Trafford, Ashley Young remains the only experienced campaigner for the right-back spot. But he endured a dismal season to say the least, both defensively and offensively.
Diogo Dalot is a promising talent but still needs to play as a squad player and earn experience before looking for a permanent berth in the starting XI. This leaves United short on options.
Aaron Wan-Bissaka could be their signing of the summer if they are successful in persuading him to the club. The 21-year old full back was arguably one of the best right-backs in Premier League this season. The Crystal Palace defender made astonishing 3.7 tackles per game and 2.4 interceptions per game.
Wan-Bissaka is in dreamland with a lot of big clubs seeking his signature. Manchester United is not in Champions League this season which could upset their plans. Wan-Bissaka may get calls from teams which are competing in the UCL.
How can he improve Manchester United?
Manchester United need a robust full-back like him who is not afraid of making challenges and has the stamina to run all day long.
Aaron Wan-Bissaka could be a perfect fit for Solskjaer system as he can defend well on one-on-one situation and can run into the opposition's half to deliver crosses.