Mason Mount was missing from Manchester United training this morning, sparking fears he will not be fit for the Premier League opener at Hull on Saturday. Mount was arguably United's player of the first three games of their pre-season campaign and his partnership with new signing Andrey Santos looked like being productive. It had been suggested the England international could be the 'third' midfielder the club had been looking for this summer, following the arrivals of Santos from Chelsea and Youri Tielemans from Aston Villa.