Wolves boss Nuno Espirito Santo has been charged by the FA after comments made about referee Lee Mason.
Nuno criticised Mason after defeat to Burnley.
“I don't like it, but I must say it, the referee does not have the quality to whistle a game in the Premier League," Nuno told Sky Sports.
“This is a problem that we knew. We already had Lee Mason before.
“This is not about the crucial mistakes or the major decisions, it is about the way he handles the game.
“The players get nervous. He whistles by the voices when some players shout.
“He doesn't have it. So we are talking about the best competition and clearly he doesn't have the quality to whistle the game.
“I told him I hope that he doesn't whistle a game involving us again because all the games we have with Lee Mason it is always the same."
He then went on to tell BBC Sport: "Football is a physical game, a game of contact and referees taking the decisions and being fair, but the referee is not good enough to whistle, Lee Mason is not good enough.
"It is about how he handles the players, both teams are always arguing the decision. He must improve because the game requires good refereeing and good handling of the game so the players can perform.
"It is his job, he has to improve, he has to get better. When we saw the nomination, we did not understand it because he is a point of distraction. He worsens the flow of the game."
Nuno refused to back down and apologise for his comments in a press conference 48 hours later.
He has until January 5 to respond to the FA's charge.