Frank Lampard accused referee Stuart Attwell of favouritism after claiming Everton were denied a penalty on the day they tumbled into the relegation zone.
Anthony Gordon appeared to be brought down by Liverpool defender Joel Matip in the 53rd minute when the Merseyside derby was locked at 0-0 but Attwell, who had earlier booked the Everton youngster for diving, was not moved.
Gordon left Anfield chuntering to a club official about why the incident had not gone to VAR and later posted about it on Twitter.
Lampard was equally gobsmacked by the decision and felt it was crucial as his side ended up losing 2-0.