Alex Ovechkin did not play in a 5-3 loss at the Rangers on Tuesday because of a lower-body injury.
The forward had an assist in 19:49 in Washington's 5-1 win at the New York Islanders on Saturday. He leads the Capitals this season in goals (36) and points (62) in 62 games.
Washington also played without forward Sonny Milano on Tuesday because of an illness.
Asked if there's a chance Ovechkin or Milano will be available when the Capitals host the Buffalo Sabres on Wednesday (7 p.m. ET; NBCSWA, MSG-B, ESPN+, SN NOW), coach Peter Laviolette said, "I have no idea. Whatever our lineup is, it's got to be ready, and we've got to win a game."