#3 Luke Shaw
The transfer of Luke Shaw to Manchester United was heralded as a coup by many critics and supporters alike, having held off stiff competition from Chelsea among others to secure a £30m deal for the talented left-back.
A then-record for a teenager, Shaw's spell with the club has been far from remarkable, mustering just 39 league appearances over four seasons to date.
In fairness, he has done well to recover from a double-leg break, especially at a stage of the campaign where he was impressive back in 2015. However, he has frequently come under-fire from Jose, who has been unhappy with the Englishman's perceived tactical indiscipline.
Ashley Young has deputised this term and done well, but it's clear that they need a strong long-term option - Celtic's Kieran Tierney is a reported target.
Shaw, 22, still has plenty of time on his side and naturally, United would look to recoup a major fee for his services too. Barcelona has been reported as a surprise destination, among others.