DALLAS — Isaiah Hartenstein had 16 points and 12 points — and scored Oklahoma City’s only two field goals of the final 8:28 — as the Thunder withstood a furious Dallas rally to beat the Mavericks 101-94 on Monday night to improve to 4-0.

Shai Gilgeous-Alexander scored 23 points to lead the defending NBA champions. Chet Holmgren had 18 points, 11 rebounds and four blocks.

Anthony Davis had 26 points and 11 rebounds for the Mavericks (1-3), playing their fourth straight home game to open the season.

Oklahoma City led 93-74 before Dallas went on a 13-0 run before Hartenstein’s tip-in gave the Thunder a 95-89 lead with 2:52 to play. The Mavericks pulled within one point on a jumper by D’Angelo Russell with 54 seconds left, and Hartenstein answered with a left-handed layup with 33 seconds to

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