Chelsea will take a zero- tolerance approach to any anti-semitic chanting from their supporters on Saturday.
Clashes between the sides are often overshadowed by the behaviour of Blues fans towards Spurs supporters, who have a large Jewish fanbase.
So Chelsea will warn fans — in the programme and on their website — that the club will not tolerate similar instances.
Tottenham manager Mauricio Pochettino, meanwhile, has ordered his side not to fall for Chelsea’s dirty tricks ahead of the derby.