Greg Buckner missed the Mavericks' game Friday night against Boston because of a sprained left knee that will sideline him indefinitely.

Buckner sustained the injury in the fourth quarter of Wednesday night's 129-127 double overtime loss to the Suns. Buckner also missed two games in late February with a bruised left knee.

"I don't know how long he'll be out,'' Mavericks coach Avery Johnson said before Friday night's game. "It could be two days, it could be a week or 10 days.''