Washington Redskins left tackle Trent Williams has claimed that umpire Roy Ellison verbally abused him during yesterday's match against the Philadelphia Eagles.

Williams alleges that Ellison approached him after a play and called him a "garbage-ass, disrespectful motherfucker" during the Redskins' eventual 24-16 defeat to their NFC East rivals.

The accusation was backed up by a number of Williams's teammates, and the 25-year-old admitted that he was shocked at the lack of professionalism shown by the official.

"This is a players' league. I don't think there's no room for that, to take that from the team and the refs. It's very unprofessional. It sucks," ESPN quotes Williams as saying.

"I'm at a loss of words. You never expect that as a player to have to beef with the refs also.

"I never disrespected him like he disrespected me. You can say whatever you want to say. I'm telling you the truth."

An NFL spokesman has confirmed that the league will look into the accusation.