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,

Irving was fouled by DeMar DeRozan on a drive to the basket and his right foot landed on the foot of the Kings' Jonas Valanciunas. He lost his balance and then landed awkwardly on his left leg,

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.