Clattenburg said, per Leeds-Live: "The two incorrect offside decisions are unforgivable. The same Assistant Referee has made earlier errors in the season and one would question how he is still operating at the top tier of the Football League.
"I am sure PGMOL and his coaches will be looking at this and trying to improve his future performances. The cry for VAR will rumble on in the Championship.
"They have goal-line technology and maybe the next step is to have offside covered by the technology which are still factual decisions but wrong decisions can have a massive impact on a club."