Thursday evening's trip to Budapest was also tarnished by alleged anti-semitic chanting, during the 2-2 Europa League draw against MOL Vidi.
"Anti-Semitism and any other kind of race-related or religious hatred is abhorrent to this club and the overwhelming majority of our fans", said a Chelsea spokesman as reported by AFP.
"It goes to the people that make the decisions, the people that make the money - they are the ones saying, "We can't have him saying that because look at the impact it will have on this football club".
"This is not the real face of Chelsea".
'I think the position doesn't change everything.
The situation has led to speculation linking Cahill with a move to Arsenal in the January transfer window, and Sarri did not deny that the England international's time at Chelsea could be coming to an end.
The Sterling incident overshadowed Chelsea's 2-0 win over defending Premier League champions Manchester City.
Board of Deputies vice-president Amanda Bowman added in a statement: "This disgraceful behaviour must be challenged and the perpetrators identified and punished".
"Morata is a player that I appreciate a lot, he has been a top player for many years", he said on Thursday.
In October, club chairman Bruce Buck suggested fans found guilty of anti-Semitic abuse may be compelled to visit the site of Auschwitz, rather than being banning.
The 27-year-old has been deployed noticeably further forward under Maurizio Sarri compared to previous managers and clearly the Chelsea boss feels that Kante can offer a significant attacking contribution to the side.
Anti-discrimination charity Kick It Out said last month that reports of discriminatory abuse within football were up 11% from last season. "He has to decide for a new contract here or another club". More information and tickets details can be seen here.
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