Damien

The action against Mikel isn't because he made the allegations (it was actually Ramires) but because he swore and confronted the Clattenburg after the game. No action will, or should, be taken against Chelsea because it hasn't been proven that they made the allegation in bad faith. They had a duty to report a incident in which one of their players felt they had been racially abused.

It seems that Clattenburg likely said 'shut up Mikel' and Ramires, whose English is poor, went to Mikel to confirm what was said and Mikel had been heard as monkey.