Everton have contacted the Professional Game Match Officials Board with concerns over some of the refereeing in their 2-0 derby defeat to Liverpool at Anfield.
It is understood the club are unhappy that the second-half incident involving their forward Anthony Gordon, who had previously been booked for diving, and Liverpool defender Joel Matip was not given due consideration.
Referee Stuart Attwell decided no penalty should be awarded and there appeared to be no VAR check afterwards as the game continued at 0-0.
Manager Frank Lampard said after the game he felt it should have been a spot-kick - and that it would have been given at the other end for Liverpool - and that is the consensus within the Everton hierarchy.