Manchester United have built a ring of steel around Old Trafford to keep out anti-Glazer protesters for Tuesday's game against Leicester and Thursday's visit of Liverpool.
The club are trying to prevent a repeat of the violent demonstrations that forced the Liverpool fixture to be postponed nine days ago and left six police officers injured.
A 10ft high red wall has been erected at the south-east corner of the stadium - where protesters twice broke in and got onto the pitch - as well the north forecourt in front of the Sir Alex Ferguson Stand.