Chelsea have released a statement making it vehemently clear that they will not tolerate any racist behavioor this weekend or in the future.
Blues supporters ashamed the west London club when they failed to let a black man onto the Paris Metro before chanting 'We're racist!' when in the French capital for the Champions League clash with Paris Saint-Germain last week.
On Sunday, Chelsea meet Tottenham in the Capital One Cup final at Wembley and there are concerns that some sections of the Blues fans could hit out at Spurs supporters because of their Jewish heritage and traditions.
But the Premier League leaders have made it clear that they won't stand for a repeat of the despicable conduct.
"For a small minority, this game has historically brought a deeply unpleasant and unwanted level of anti-Semitic abuse," read a Chelsea statement.
"Opposition supporters using terms as a form of identity is no excuse for abusive chanting or behaviour. The club asks that all supporters realise such actions cause huge offence to those around them.
"If we receive evidence that supporters have engaged in anti-Semitic or any other form of discriminatory chanting or behaviour, we will take the strongest possible action, including supporting criminal prosecution.
"Recent events in Paris have seen Chelsea fans united in their contempt for a mindless few.
"Chelsea is proud of the diversity within our club and our vision embraces equality regardless of race, gender, sexuality, disability or religion. We all share the common cause of supporting our team."
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