Philadelphia 76ers' star Joel Embiid suffered a right knee injury after a hard fall Monday night, which knocked him out of his team's 122-114 Game 4 loss at the Washington Wizards.
Embiid limped to the locker room during the first half and was ruled out during halftime. It's not clear if the big man will be able to play in Game 5 on Wednesday.
"I actually don't know," Rivers said of Embiid's status for Game 5.
Embiid played 51 games this season and missed time with knee and shoulder injuries.
Philadelphia is a legitimate NBA title contender with a fully healthy Embiid. He was an MVP candidate who led the Sixers in scoring (28.5 points per game) and rebounding (10.6) during the regular season.
