Reading striker Noel Hunt slammed ref Jon Moss after their defeat to Aston Villa.
Unhappy Hunt claimed Moss and his fellow officials were a "disgrace" and branded them "embarrassing" as well as swearing in his anger at the decisions.
Hunt said: "I've seen the offside and I've seen the f***ing penalty on me in the first half and it's a disgrace.
"It's a joke that he has not given it, I don't know what he is looking at, but these decisions are embarrassing. It makes the game a different game.
"There is no excuse. He's (Guzan) just punched me in the back of the head and got the ball and you wouldn't get away with it in rugby.
"I was trying to see where the ball was coming from (on disallowed goal) and my chest is off, but my feet behind. The linesman's position was shocking and he was two or three yards behind it."