Premier League referee Lee Mason has pulled out of fourth official duties at Sunday's game between Sheffield United and Liverpool because of injury.
He was at the centre of a controversial free-kick incident in Brighton's defeat at West Brom on Saturday.
Lewis Dunk scored from a quick free-kick; Mason disallowed the goal before awarding it but then ruled it out after the video assistant referee intervened.
It is understood Mason, who was limping after the game, has a muscle strain.
John Brookes will come in as replacement at Bramall Lane.
Brighton captain Dunk accused Mason of losing control of the game after his side lost 1-0 at The Hawthorns.
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