Weeeelll; it's obvious, innit? That horrible Johnny Foreigner Sheikh wotsit clearly bribed the judging panel. It's an outrage that Harry Maguire or Divock Origi didn't get the nod.
His form in the second half of the season has been sensational, and the award is fully deserved. He was obviously struggling in the early part of the season to overcome the injuries he suffered last season, but form is temporary, class is permanent.