straight to your inbox every day, freeLuke Shaw has explained that Manchester United must 'work harder than ever' and improve defensively to turn their fortunes around in the Premier League after the international break.It's been an awful start to the league season for United, as they sit down in 16th place with just three points on the board after three matches.Ole Gunnar Solskjaer's side conceded 11 goals in those games and suffered humiliating defeats at Old Trafford at the hands of Crystal