Roy Keane has branded Chelsea's players 'disgraceful' and claimed that former boss Andre Villas-Boas was 'let down badly' by the group.
The Portuguese manager was sacked on Sunday after a run of poor results and amid continued reports that his players had lost respect for him.
As a pundit for ITV Sport, Keane revealed his disgust at the Chelsea players as footage was shown of them laughing and joking ahead of their 2-0 win over Birmingham City.
"They've let their manager down. So childish. It's crazy. All that carry-on is ridiculous," said the 40-year-old former Manchester United captain.
"They shouldn't be smiling. They should be focused on trying to win a game of football.
"I keep going on about pride. They've let their manager down badly and yet they're carrying on like that in the warm-up, flicking each other's ears, it's an absolute disgrace."
On Monday, former Chelsea coach Ray Wilkins defended the Blues players by calling them "an absolute delight to work with".
