Chelsea said they were "extremely disappointed" and "embarrassed" after their fans failed to observe a minute's silence at the FA Cup semi-final.
The intended silence was meant to be a tribute to the Liverpool supporters who died in the 1989 Hillsborough disaster.
But after sections of Chelsea supporters disrupted the silence at Wembley referee Martin Atkinson was forced to cut the minute short.
"Chelsea Football Club is extremely disappointed that a very small minority of fans embarrassed the club today by not honouring the moment's silence before kick-off," Chelsea said in a statement.
"Chelsea FC believes all moments of respect should be honoured and today we pay our full respects to all those that suffered as a result of the Hillsborough disaster 23 years ago."
Chelsea manager Roberto Di Matteo also voiced his dismay.
"We are extremely disappointed that a minority or just a few fans decided to speak or sing during the minute's silence," Di Matteo said.
Chelsea beat Tottenham 5-1 to set up a final next month against Liverpool.