West Ham manager David Moyes has revealed that the club have received confirmation from Premier League referees that full-back Vladimir Coufal should not have been sent off against Arsenal earlier this month.
With the Gunners holding a narrow one-goal advantage in the second half at the Emirates Stadium, Coufal was adjudged to have brought down Alexandre Lacazette inside the penalty area despite seemingly making contact with the ball.
The Czech defender was given a second yellow card for the challenge, meaning that West Ham had to play the remainder of the game with 10 men.
Lacazette missed the resulting penalty, but Mikel Arteta's men went on to win the match 2-0.
Coufal's dismissal came just three days after the Hammers were not awarded a penalty themselves when Craig Dawson appeared to be brought down in the box by Dwight McNeil in West Ham's 0-0 draw at Burnley.
Speaking on Tuesday, Moyes claimed that he had been informed that both decisions were incorrect.
'I think that this year the referees have had their best performances until the last couple of weeks,' he told reporters.
'We have got clarification from the referees that it was the wrong decision to send (Coufal) off and that we should have had a penalty at Burnley.
'I find it really hard that we have two sets of eyes and they are not getting it correct. I have been a football player and a manager, I would hope if I'm sitting in front of a TV from four or five angles I would have a really good opinion.
'And if I was unsure I'd send the referee over to collaborate rather than leaving it to one person.'
West Ham will now have to cope without the suspended Coufal when they face Tottenham in their Carabao Cup quarter-final clash on Wednesday.
The Irons have already seen off both Manchester clubs in this season's competition, but they enter the match having only won one of their last six league games.