Wolves boss Nuno Espirito Santo tells 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.
"The way he handles the game, it is about the major, crucial decisions, 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."