3) Juan Mata
The Spaniard has had a strange career in England after having such a massive impact at Chelsea before Jose Mourinho famously drove him out of Stamford Bridge with David Moyes only too happy to sign Mata for United for a reported fee of £40million in the 2014 January transfer window.
Despite playing 262 times in the Premier League for Chelsea and Manchester United, he has never been fully appreciated at either club despite his creativity and undoubted talent.
Mata scored 20 goals in all competitions during the 2012/13 campaign for Chelsea, and he has hit double figures in three of his eight seasons at Old Trafford, but his career seems to have drifted into becoming a bit-part player for United over the last few years.