West Ham have told the Football Association they will appeal against the red card shown to Sofiane Feghouli during Monday's defeat to Manchester United.
Feghouli was sent off after 15 minutes by referee Mike Dean for a tackle on United defender Phil Jones as the Hammers lost 2-0 at the London Stadium.
Replays suggested the decision had been harsh and West Ham will now appeal in the hope of sparing their midfielder a three-match suspension.
A club spokesman told Press Association Sport: "The FA have been informed of our intention to appeal."
If a three-match ban is upheld, Feghouli would miss West Ham's FA Cup third round tie at home to Manchester City on Friday, as well as Premier League fixtures against Crystal Palace and Middlesbrough.
Feghouli was making his first league start of the season against United after joining Slaven Bilic's side on a free transfer from Valencia last summer.
Jose Mourinho got the big calls right. Mike Dean did not. That was the story of this tired encounter, ruined by an early red card and a brittle referee who lost his way - abetted by an errant linesman late on - with, ultimately, Manchester United remaining on track in their pursuit of the top four and, maybe, a genuine and unexpected Premier League title challenge.
Referee Mike Dean is back in the spotlight once again and now Match of the Day host Gary Lineker has accused the official of "seeking attention" after his latest contentious decision.