By Ewan Murray Bragging rights and a trophy are up for grabs this weekend when Manchester United face local rivals Manchester City in the Community Shield at Wembley Stadium. Having offered the much-maligned Erik ten Hag a new contract following last season’s FA Cup triumph – the victory that ensured United’s place in the Community Shield – the Red Devils have been attempting to make some much-needed progress during pre-season. Two lucrative signings have improved morale but some concerning friendly results have served as a reality check. Of course, pre-season is just pre-season and means abso…