Jeff Stelling has now claimed that one Manchester United player has been the biggest disappointment in the Premier League this season. Erik ten Hag’s side are certainly used to a bit of criticism coming their way by this point, which is perhaps fair given their lacklustre campaign. Alan Shearer recently labelled their season as a ‘disaster’, even if it could still be salvaged against Manchester City on Saturday. The FA Cup final is perhaps a chance for Ten Hag to save his job amid all of the uncertainty that seems to shroud his future. But either way, the summer promises big changes at Old Tra…