Chelsea fans have taken to social media to criticise Arsenal forward Kai Havertz, who appeared to 'shush' fans after scoring a first-half goal, which was later ruled to be offside.
Blues fans claim the gesture was disrespectful considering the forward is a former player, and that the goading unnecessary.
But Gunner fans have jumped to the German international's defence, saying he had every right to react in that way considering the way he was treated during his time at the west London club.
The incident happened in the 32nd minute of Chelsea's home clash with Arsenal at Stamford Bridge.