Chelsea were again embarrassed at Watford by a section of supporters using the Y-word in a popular song about Willian.
It is the latest in a series of incidents which the club have been desperate to stamp out, starting with allegations of racist abuse at Raheem Sterling and then the same anti-Semitic chants which were heard during a Europa League tie in Hungary.
'First of all, I want to speak with my club,' said manager Maurizio Sarri. 'I didn't hear anything. And I don't want to generalise.
'For 99 per cent of cases our fans are wonderful but in every community there are some stupid people and altogether we have to fight against the stupid people - but not against the Chelsea fans.