The most exalted defensive matchups in the N. But every time down the floor? For 48 minutes? With an undersized roster that has endured the long grind of the postseason?By the time the Nuggets managed to get the ball upcourt, just 14 seconds remained on the shot clock, and the Heat’s defense had morphed into a halfcourt zone — a 2-3 set, with two players up top at the perimeter and three along the baseline. finals, but his players have acknowledged the zone’s amorphous nature