Charlotte coach James Borrego said it's unclear when the 2017 All-Star might return to action. Hayward also has been dealing with a sore right foot.
"It's unfortunate, it's disruptive, but that's the nature of the sport and the game and life," Borrego said. "So we'll move forward. Obviously, we've had a hard time the last year and a half without him so it's time for someone on the bench to step up."
Hayward has started 45 games for Charlotte this season and is fourth on the team in scoring at 17 points per game.
The Associated Press contributed to this report.