Crystal Palace midfielder Jason Puncheon has been charged by the Football Association for comments made in relation to Neil Warnock.
Puncheon took exception to his former manager's criticism of his penalty miss in the 2-0 defeat to Tottenham in January and responded with a series of Twitter posts.
The FA said Puncheon, 27, "failed to act in the best interests of the game".
The winger has until 18:00 GMT on Thursday to respond to the charge.
In his role as a pundit on Talksport, Warnock had said: "There's no way I would've trusted him with a penalty. You've got to have somebody a little bit more cool, and he's not like that, Jason.
"He can whack a 35-yard free-kick in here and there but a penalty, with all the pressure on him at a place like White Hart Lane - not in a million years for me."
Puncheon, on loan from Southampton, posted several tweets, which he has since deleted, in which he accepted "banter and opinions" over his miss.
He wrote: "As a man I will live with that, which is fine, but I will not live with [Warnock's] opinion."
However, Warnock, who was in charge at QPR when Puncheon played there on loan, rejected the comments.
"If it's been suggested I have done anything untoward, I can confirm I most certainly haven't," Warnock said. "The matter is being addressed with him directly on my behalf."