Mikel Arteta was seen 'screaming' at Kieran Tierney before his confrontation with Cucho Hernandez.
It was a difficult afternoon at the office for the Gunners despite securing a 3-2 win at Vicarage Road as the likes of Emmanuel Dennis and Hernandez caused their defence all sorts of problems.
The Colombian, who scored an acrobatic finish to cancel out Martin Odegaard's opener, imposed himself down the right-hand side throughout the 90 minutes.
