DALLAS — Kevin Durant’s miserable fourth quarter ended with a final miss that gave Dallas a chance to finish a rally in overtime Friday night.

The Oklahoma City star took care of things in the extra period instead, and ended up with a career high and the first 50-point game in the NBA this season.

Durant scored 52 points, including the go-ahead basket with 16.9 seconds remaining in overtime, and the Thunder held on for a 117-114 victory that extended their winning streak to six games and ended the Mavericks’ season-best run of four straight.

A night after getting voted a starter for the All-Star game, Durant missed six straight shots and was 2 of 11 from the field while the Mavericks were rallying in the fourth quarter.

Durant was still scoring because he couldn’t miss at the free throw line. He was 19 of 19 in regulation, and finished with 43 points.