The safety of players is at the top of the agenda after Jack Grealish was attacked on the pitch and Chris Smalling was confronted, with the Professional Footballers' Association calling for a full inquiry after a dark day for the sport.
Two fans were arrested following separate incidents on Sunday, with Aston Villa skipper Grealish punched by a fan just hours before a spectator ran towards Smalling and appeared to push him during Manchester United's 2-0 defeat at Arsenal.
Grealish was struck on the side of the head after nine minutes as he stood in Birmingham's penalty area during the derby match at St Andrew's.
