Arsenal have been on the receiving end of a number of controversial refereeing decisions already this season. Mikel Arteta’s side have been caught up in accusations of ‘dark arts’. Manchester City defender John Stones described Arsenal as “dirty” due to the tactics that the Gunners employed on their trip to the Etihad Stadium. Meanwhile, Declan Rice and Leandro Trossard have both seen shown second yellow cards and sent off in games this season after having been deemed to have delayed a restart by kicking the ball away after conceding a free kick. Former Premier League referee Dermot Gallagher …