Jurgen Klopp said referee Chris Kavanagh spotted something that no one else saw when he awarded Everton a penalty in their 2-0 win against Liverpool on Saturday.
With Everton up 1-0 late in the match, Dominic Calvert-Lewin had an effort saved by Alisson and tried to follow up from the rebound, but was tripped by Trent Alexander-Arnold.
Kavanagh pointed to the spot after a quick VAR check, and Gylfi Sigurdsson stepped up to slot past Alisson and seal a win for the Toffees against their Merseyside rivals for the first time since 2010.