Kyrie Irving suffered a left knee sprain Monday night and shot free throws for the Dallas Mavericks before leaving the floor in obvious pain late in the first quarter against the Sacramento Kings.

Kyrie Irving's toughness is not in question, but when he will play again for the Mavericks is. In the first quarter Monday night, Irving drove the lane against Sacramento, was fouled by DeMar DeRozan,

Star was helped to the line by Anthony Davis, who has been injured since Feb. 8, when he strained his abductor muscle in his first game after being traded to the team by the Los Angeles Lakers