Shai Gilgeous-Alexander had 29 points, nine rebounds and nine assists and the top-seeded Oklahoma City Thunder kept Luka Dončić in check to pull away for a 117-95 victory in Game 1 of their Western Conference semifinal series on Tuesday.

Chet Holmgren had 19 points and seven rebounds and Jalen Williams scored 10 of his 18 points in the fourth quarter as the Thunder remained unbeaten in the playoffs.

Game 2 is Thursday night in Oklahoma City.

Doncic entered this series averaging just under 30 points per game in these playoffs but was limited to 19 on 6-of-19 shooting, including 1 of 8 from 3-point range, and had five turnovers.

Kyrie Irving led Dallas with 20 points and Daniel Gafford had 16, 11 rebounds and five blocks.

The Thunder held just a 69-67 lead midway through the third quarter before a 20-7 run increased the advantage to 89-74.

Dallas got the deficit down to 96-87 on Irving’s 3 with 8:31 remaining, but Williams hit consecutive 3s and then dunked to make it 104-87.

Celtics handle Cavs in Game 1

Jaylen Brown scored 32 points and Derrick White added 25 with seven 3-pointers to lead the Boston Celtics to a 120-95 win over the Cleveland Cavaliers in the opener of their Eastern Conference second-round series.

Jayson Tatum had 18 points and 11 rebounds and Payton Pritchard scored 16 for the Celtics, who improved to 5-1 in this postseason and will host Game 2 on Thursday night.

Donovan Mitchell had 33 points and six assists and Evan Mobley added 17 and 13 rebounds as Cleveland lost for the fourth time in as many road playoff games.

Boston shot 18 of 46 from 3-point range and took a 15-point lead into the fourth quarter. The Celtics started the final quarter with a 10-2 run to essentially put the game out of reach.

Both teams played without their starting centres. Cleveland’s Jarrett Allen missed his fourth straight game with a bruised rib and Boston’s Kristaps Porzingis was sidelined for the second consecutive game with a strained right calf.