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,

The Dallas Mavericks cannot afford any more injuries, let alone to a player as significant as Kyrie Irving, so they're going to have to hold their breath and hope that the knee injury that Irving suffered Monday night vs.

Kyrie Irving suffered a left knee sprain Monday night and shot free throws for the Mavericks — with tears rolling down his cheeks — before leaving the floor in obvious pain late in the first quarter of Dallas' 122-98 loss to the Sacramento Kings.