ASHBURN, Va. (CBSDC) — The Washington Redskins held their 11th walk-through of camp this morning and will have their first closed practice of training camp this afternoon as they make final preparations for their first preseason game, Thursday, in Buffalo against the Bills.

Starting right guard Chris Chester sprained his left ankle yesterday in practice and he isn’t sure if he’ll be able to go Thursday.

“We’ll have to see, I hope so,”  Chester said on if he’ll be able to play.

If Chester can’t go, rookie Adam Gettis could be getting the start at right guard.

“I wouldn’t think it would take very long,”  Chester said on his ankle and added that their was no grade assigned to it on the severity.

The Redskins will already be without starting left guard Kory Lichtensteiger and starting right tackle Jammal Brown.

Redskins linebacker Brian Orakpo also spoke to the media this morning and praised third-year tackle left tackle Trent Williams.

“I told him personally, he’s top three in the league for sure right now,”  Orakpo said.