Wolves boss Nuno Espirito Santo said referee Lee Mason "is not good enough" after his side's 2-1 defeat by Burnley.
Ashley Barnes and Chris Wood were on target for Burnley before Fabio Silva pulled one back for Wolves from the penalty spot in the 89th minute.
It is the second time Mason has officiated Wolves this season and Nuno says he is a "point of distraction" and "worsens the flow of the game".
"It is his job, he has to improve, he has to get better," he told BBC Sport.
The Portuguese added: "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.