4. Robin van Persie
Robin van Persie almost singlehandedly won United the title last year.
Signed from Arsenal, van Persie continued his incredible form to seal a memorable 20th league title for United last term.
Although blighted by injury this season - and indeed close to every season of his career - van Persie is world class.
On his day one of the world's best players, van Persie has found life under new manager David Moyes markedly less enjoyable, but the Dutchman remains a joy to watch.