l: a physical, pound the paint, and defensive style of playing that the Mavs could not adjust to in Game 1.
The Nuggets went for every block and every steal while clogging up the lane and batting away any one who dares come near the basket. The Mavs were frustrated by the non-calls and could not play their slow, half court game. The Mavs became careless with the ball and just gave away the ball in the second half. That, and the Mavs bench didn't show up.
