Duncan, Spurs collapse down the stretch in Game 6 - ABC 33/40 - Birmingham News, Weather, Sports

Duncan, Spurs collapse down the stretch in Game 6

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San Antonio Spurs power forward Tim Duncan (21) works as Miami Heat shooting guard Mike Miller (13) defends during the second half of Game 6 of the NBA Finals basketball game, Tuesday, June 18, 2013 in Miami. (AP Photo/Lynne Sladky) San Antonio Spurs power forward Tim Duncan (21) works as Miami Heat shooting guard Mike Miller (13) defends during the second half of Game 6 of the NBA Finals basketball game, Tuesday, June 18, 2013 in Miami. (AP Photo/Lynne Sladky)

MIAMI (AP) — Tim Duncan was delivering a vintage performance, and the San Antonio Spurs were streaking to the franchise's fifth championship.

Then the 37-year-old forward ran out of gas, and the Spurs collapsed down the stretch like they so rarely have before.

Duncan had 30 points and 14 rebounds in the first three quarters, but was scoreless and grabbed just three boards in the fourth quarter and overtime of San Antonio's 103-100 overtime loss to the Miami Heat in Game 6 of the NBA Finals on Tuesday night.

The Spurs led by 10 points at the start of the fourth quarter and by five with 28 seconds to play. But Duncan missed all five of his shots in the fourth quarter and overtime.

Game 7 is on Thursday night in Miami.