Anthony Davis (center) of the Los Angeles Lakers reaches for a rebound over Mikal Bridges (left) and Devin Booker of the Phoenix Suns on Sunday in Phoenix, Arizona. Photo: VCG

Devin Booker made the most of his playoff debut, scoring 34 points as the Phoenix Suns beat the reigning NBA ­champion Los Angeles Lakers in their Western Conference series opener on Sunday.

Booker spearheaded the 99-90 win for the second-seeded Suns over the Lakers, rallying his team after an injury restricted Phoenix veteran Chris Paul's influence.

Booker was backed by Deandre Ayton, who contributed 21 points and 16 rebounds, while Mikal Bridges and ­Cameron Johnson added 10 points apiece for Phoenix.

A physical encounter saw the Suns' Cameron Payne ejected in the fourth quarter after a shoving match which saw players and backroom staff stream onto the court as tempers flared.

The Lakers, meanwhile, struggled to hit their stride throughout, with LeBron James finishing with 18 points and Anthony Davis with 13 points after making only five-of-16 from the field.

Barring an early spell in the first quarter when the Lakers led by five points, the Suns led throughout, maintaining a double-digit cushion for much of the second half and leading by 16 points early in the fourth.

In other games on Sunday, Dillon Brooks and Ja Morant combined for 57 points as the eighth-seeded Memphis Grizzlies stunned the top-seeded Utah Jazz 112-109 in their series opener in Salt Lake City.

Canada's Brooks had a team-high 31 points and American Morant poured in 26 for the Grizzlies.

Jonas Valanciunas had 15 points and 12 rebounds while Kyle Anderson added 14 points for the Grizzlies, who are in the postseason for the first time in four years.

Guard Mike Conley finished with 22 points and 11 assists, and forward Bojan Bogdanovic scored 29 points for the Jazz, who were missing All-Star Donovan Mitchell for the 17th straight game.

In New York, Trae Young made a short jumper with one second left to lift the Atlanta Hawks to a 107-105 win over the New York Knicks in the first game of their East series.

Young scored a game-high 32 points, 10 assists and went nine-of-nine from the free throw line at Madison Square Garden as Atlanta edged the Knicks after losing all three games to them during the regular season.