Players celebrating against their former clubs, some do it whilst others opt against it as a sign of respect.
Already this season, Erling Haaland took the latter approach after finding the back of the net for Manchester City against Borussia Dortmund in the Champions League as he simply raised his hands - almost apologetically to the visiting fans - as his teammates rushed to congratulate him.
Over the years it has been a mixed bag for Arsenal supporters. Cesc Fabregas' celebrations were muted after scoring for Chelsea in February 2017, but numerous former players from Nicolas Anelka to Robin van Persie and Theo Walcott haven't exactly held back when returning to haunt their old club.
