West Ham boss Avram Grant claims refereeing errors have cost his relegation-threatened team at least 10 points this season.
Grant's team are outside the bottom three on goal difference alone as they head into Saturday's lunchtime clash with leaders Manchester United at Upton Park.
Grant believes teams will need 40 points or more to secure their top-flight status this year and while West Ham have reached 32 from 30 games their manager believes that total would be far healthier had they had better luck with referees.
He said: "I think we have suffered more than any other team because in the very deciding moments, as everyone has seen on the television, the decision was against us too many times.
"If the decision was right, we would have had at least 10 points more. But this is part of the game, sometimes there are decisions against you.
"You can accept one decision that was for us, but most of the decisions were against us."