Nottingham Forest are reportedly considering whether to make an official complaint to referees' body PGMOL over the performance of Stuart Attwell and his assistants in their 3-2 defeat against Manchester United.
Forest captain Joe Worrall was sent off by Attwell for denying a goalscoring opportunity at 2-2, as the hosts fought back from conceding two goals in the opening four minutes.
The visitors believed Willy Boly was a covering defender, but the VAR officials stuck with Attwell's on-field decision.
Man United completed the comeback via a Bruno Fernandes penalty after Marcus Rashford was brought down by Danilo.