Chelsea fans face being banned for life as the club try to prevent their Alvaro Morata song.
“People should know that the police will be involved. We must be clear on this because it has to stop,” said Chelsea head of communications Steve Atkins.
“Chelsea Football Club finds all form of discrimination abhorrent. The language used in that song is totally unacceptable.
“People that use this kind of language against others always try and argue a grey area. There is no grey area. That language used was anti-Semitic. We have a zero tolerance towards it.”