Chelsea have condemned chants from their own fans about Queens Park Rangers defender Anton Ferdinand during their 1-1 UEFA Champions League draw at Genk on Tuesday.
A section of Blues supporters repeatedly chanted about Ferdinand in response to the John Terry racism inquiry now the subject of investigations by the Football Association and the Metropolitan Police.
Terry, who was left on the bench in Belgium, released a statement to deny allegations he had racially abused Ferdinand during last month's West London derby after video footage posted online caused a storm.
It is unclear whether Chelsea could face any action over the chanting at the Cristal Stadium but officials were quick to set out the club's stance.
"The chanting was wholly inappropriate and we don't condone it,'' a club spokesman said in a statement.
Manager Andre Villas-Boas insisted he had not heard the chanting, which was at its loudest shortly before and shortly after half-time.
He said: "I was concentrating on the game.''