The refereeing body of the Premier League needs to give answers about the failure to award a penalty in the derby.
It is understood that on Monday,Everton officially approached the group responsible for refereeing standards in the top flight to ask for an explanation around the incident in the 53rd minute when it is thought that Anthony Gordon was shoved to the ground byJoel Matip.
The referee waved away the protests and even more when the VAR declined to intervene in the incident, as he deemed an on-field review was not necessary.
The score was still goalless at the time of the incident, so the technology was not used with due consideration.
The club is not looking for an apology but for an explanation as to why the VAR check was so quick and not a break in play.
During their loss to Manchester City in March, the club felt they were not given a fair chance to win the game because of the refereeing decisions.
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The head of referees apologized to both the chairman and the player over the phone.
On Sunday, Jamie Carragher told Sky Sports that Attwell was influenced by an incident in the first half when he booked Gordon for what he perceived to be a simulation and denied a clear penalty.
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The Reds have not given away a single spot-kick in the league.
Gordon posted a video on his account with two facepalms.
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Attwell waved away Gordon's protests because of the rowdy home crowd.
He said it was a penalty in the second half. I don't think you get them here. I think he gets a penalty if that is Mo Salah at the other end.
I am not trying to create conflict there, I just think it is the reality of football. You get more from playing for clubs at the top of the league if the crowd is behind them.
The second one is a foul. It's a clear foul. You don't get them here.
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What do you think about the decision in the weekly Ref Watch segment?
The referee made a decision on the field.
The referee has to make this decision on the field. He goes down because there is an arm on the shoulder. I believe they get tangled up.
The referee doesn't make an instant decision. He almost runs it through, gives himself time and makes his decision, if you look at him.
The referee has thought it through so much that you can't say he made a clear and obvious error.
I would have gone with my gut reaction. I thought it was a penalty when I first saw it. It was a bit too theatrical for his liking. I would have stuck with no penalty if I had gone to the screen.
The referees have a threshold of whether or not there is enough contact to give a penalty. They did not think it covered the threshold. It has to be Stuart's call.
Sky Sports News understands that the FA warned both teams about the mass confrontation of players and the attempt to intimidate the referee during the derby.
The incidents were analysed on Monday and the report was received.
The FA's Disciplinary team decided that there was no case for Sadio Mane to answer for the clash with Mason Holgate.
Richarlison was on the ground waiting for treatment after Fabinho was hacked down by Abdoulaye Doucoure. Richarlison was accused of faking injury and time wasting.
There has been no comment from the FA.