Tim Frazier will start in Wall's place.
While Wall suffered a shoulder injury earlier in the season, he has been durable in recent years, playing all 82 games in 2013-14, 79 games in 2014-15, 77 games in 2015-16 and 78 games in 2016-17.
Losing Wall for significant time would be a devastating blow to the Wizards' chances at contending for an Eastern Conference title, considering he is their leader and floor general. The four-time All-Star was a member of the All-NBA Third Team last season with a career-high 23.1 points and 10.7 assists per game and has followed up with 19.9 points and 9.3 assists in 2017-18.
Washington can still rely on Bradley Beal to carry its offense from the backcourt and has Frazier to handle the ball in a facilitator role, but it will take a group effort to replace Wall's production while he is out.
The Wizards likely need him back and healthy to have a realistic chance at competing with the league's best teams in the playoffs.