Arsenal boss Arsene Wenger was left frustrated after their 1-1 draw with West Brom.
But the Baggies were awarded a penalty with a minute remaining as Kieran Gibbs kicked the ball at Calum Chambers and it caught his hand, leaving Jay Rodriguez to fire down the centre of the goal to beat Petr Cech and claim a point.
Wenger snapped: "I think the referee has not even seen it. He has not seen it.
"I'm angry because we have seen the same things again and again and I said down there that we have fought very hard for the referees to become professional many years ago with David Dein and we did a good job to allow them to become professional and I see no improvement.
"At the end of the day there are two countries in Europe where there are professional referees, in Italy and in England, but not one English referee will go to the World Cup, but everything is alright. We cannot say a word against because they are untouchable, it is the case and the truth as well, it is a reason for it. It's not only me who judges them."
Wenger angrily continued: "There are two things that are not normal in the Premier League, the schedule and the referees. Maybe we haven't played well enough, that is down for you to judge, but with those two things you cannot have West Brom with five days to prepare while we have three. I am ready to play every day as long as our opponent has had the same recovery time over Christmas, it's not normal. We have the same problem against Chelsea, they played yesterday, we played today. They have one day more."