OKLAHOMA CITY — Shai Gilgeous-Alexander scored 25 points and the Oklahoma City Thunder began their title defense with a 119-84 rout of the Phoenix Suns in Game 1 of their first-round Western Conference playoff series on Sunday.

The reigning league MVP made just 5 of 18 field goals but went 15 of 17 at the foul line before sitting out the fourth quarter.

Jalen Williams scored 22 points and Chet Holmgren added 16 for the top-seeded Thunder, who will host Game 2 on Wednesday.

Devin Booker scored 23 points and Dillon Brooks scored 18 on 6-of-22 shooting for the Suns, who shot 34.9% from the field.

Phoenix broke out to a 5-0 lead as the Thunder started cold following a week off.

Oklahoma City heated up quickly. Brooks was called for a flagrant-one foul in the first quarter for hitting Holmgren in the face. The Thunder went on a 12-2 surge after that to take a 24-14 lead.

In the closing seconds of the quarter, Oklahoma City’s Jaylin Williams threw a pass about three-quarters of the length of the court. Holmgren caught it with his back to the basket, took one dribble to his right, then turned and drained a 3-pointer as time expired to put Oklahoma City up 35-20.

Oklahoma City extended the advantage to 65-44 at halftime. Holmgren had 16 points and Gilgeous-Alexander had 15 at the break.

Gilgeous-Alexander converted a three-point play to push Oklahoma City’s lead to 90-63 late in the third quarter, and the Thunder took a 97-66 edge into the fourth.