There was always going to be a flashpoint and when it arrived Mikel Arteta’s reaction was both predictable and instant.
So much had been said and written about Pierre Emerick-Aubameyang, the Chelsea striker who this time last year was still wearing Arsenal ’s armband, in the lead up to this London derby that there simply had to be a moment.
And even though the pair did not lock horns directly, the reaction of Arsenal’s head coach on the touchline was impossible to ignore.
