Jason Puncheon has been charged by the Football Association over comments he made about Neil Warnock on Twitter.
Crystal Palace forward Puncheon made allegations about the club's former manager in response to criticism over a missed penalty at Tottenham in January.
The Tweets were later deleted, and Warnock said at the time he was considering his legal options.
Warnock said in a statement last month: "The first tweet 'everyone is entitled to their opinion' I haven't got a problem with, but moving on from this is his later tweets. He's made comments I know nothing about. If it has been suggested I have done anything untoward I confirm I most certainly have not.
"I notice Jason has removed his tweets. The matter is being addressed directly with him on my behalf. In the circumstances there is nothing more for me to say."
In the meantime, the FA has been looking into the case, and Puncheon has now been charged with a breach of its rules governing social media.
A statement from the governing body read: "It is alleged that in posting these comments, Puncheon failed to act in the best interests of the game, and/or acted in a manner which was improper, and/or used abusive and/or insulting words in contravention of FA Rule E3.
"Puncheon has until 6pm on Thursday 27 February 2014 to respond to the charge."