Capitals defenseman Christian Djoos missed practice Wednesday because of an undisclosed "upper-body" injury he suffered against the Nashville Predators on Tuesday night. He's expected to miss tonight's game against the Colorado Avalanche, with veteran Taylor Chorney likely to take his place. The injury is a hit to the Capitals, who just got defenseman Matt Niskanen back from a left hand injury that sidelined him for 13 games. Djoos, a rookie, has played in 16 games, accumulating two goals and one assist while averaging more than 14 minutes of ice time. He played just 5:48 against the Predators before being ruled out for the rest of the game. Tonight would mark the first game he's missed since his debut Oct. 11. Washington already had eight defensemen on the roster, so even with Djoos' injury, there's no immediate need for the team to recall another blue-liner. But depending on how long he's expected to be out, the Capitals could use that as an opportunity to get a look at one of their other defense prospects. Earlier in the season, general manager Brian MacLellan indicated that he wanted to get 2015 second-round pick Jonas Siegenthaler some NHL action this year. Chorney skated on a pairing with rookie Madison Bowey on Wednesday. In Niskanen's first game back after missing a month of the season, he played 20:33 and took four shots on goal.