If Manchester United’s collapse against FC Twente was not worrying enough for Erik ten Hag, the noises coming out of the Old Trafford dressing room provided further cause for concern. Like against Manchester City, Brighton and Hove Albion and in Saturday’s goalless draw at Crystal Palace, the Red Devils were once again left to rue their baffling inability to win a game they should have put to bed pretty comfortably. Chances were wasted, mistakes were made. And, suddenly, Manchester United are under pressure to get a win on the board away to FC Porto at the start of October. FC Twente – while f…