Chelsea will take action to stop unofficial retailers outside Stamford Bridge selling T-shirts containing offensive words about and images of Arsène Wenger, the Arsenal manager, and Harry Kane, the Tottenham Hotspur centre forward.

The T-shirts were being sold on Fulham Road before and after Sunday’s Barclays Premier League match with Manchester United. One of the T-shirts featured Kane dressed up as a Hasidic Jew with the slogan: “He’s one of your own”. Tottenham fans, who often face anti-semitic chants, sing “he’s one of our own” about Kane.

The other T-shirt contains a picture of Wenger wearing hotpants and the slogan: “With a pack of sweets and a cheeky smile”, which is the beginning of a cruel song that is sung by many fans in which