Zion Williamson had 21 points and 11 rebounds in 27 minutes, and the New Orleans Pelicans beat the Boston Celtics 123-108 on Sunday for their first victory since the rookie star joined the lineup.

Jrue Holiday had 25 points, JJ Redick scored 17 and Brandon Ingram added 16 for New Orleans, which snapped a two-game slide.

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New Orleans Pelicans forward Zion Williamson (1) shoots against Boston Celtics center Daniel Theis (27) in the first half of an NBA basketball game in New Orleans, Sunday, Jan. 26, 2020. (AP PhotoGerald Herbert)

Zion Williamson had 21 points and 11 rebounds in 27 minutes, and the New Orleans Pelicans beat the Boston Celtics 123-108 on Sunday for their first victory since the rookie star joined the lineup.

New Orleans Pelicans center Derrick Favors (22) slam-dunks over Boston Celtics center Daniel Theis in the first half of an NBA basketball game in New Orleans, Sunday, Jan. 26, 2020. (AP PhotoGerald Herbert)

It paid off. Williamson scored eight points in the final three minutes — highlighted by a dunk on a baseline cut as he was fouled — and the Pelicans pulled away.

New Orleans Pelicans center Derrick Favors (22) is fouled as he goes to the basket between Boston Celtics guard Jaylen Brown (7) and center Daniel Theis in the first half of an NBA basketball game in New Orleans, Sunday, Jan. 26, 2020. (AP PhotoGerald Herbert)

Seven Pelicans players combined for 10 3-pointers in the opening half, with Ingram, Holiday and Lonzo Ball each hitting two.

Boston Celtics center Daniel Theis (27) goes to the basket over New Orleans Pelicans center Jaxson Hayes (10) in the first half of an NBA basketball game in New Orleans, Sunday, Jan. 26, 2020. (AP PhotoGerald Herbert)

Soon after, Walker hit a 3 and added free throws during a 7-0 mini-run that pulled Boston to 87-79.

Boston Celtics guard Marcus Smart (36) shoots against New Orleans Pelicans guard E'Twaun Moore (55) in the first half of an NBA basketball game in New Orleans, Sunday, Jan. 26, 2020. (AP PhotoGerald Herbert)

TIP-INS

Boston Celtics guard Kemba Walker (8) goes to the basket between New Orleans Pelicans center Derrick Favors (22) and guard Josh Hart (3) in the first half of an NBA basketball game in New Orleans, Sunday, Jan. 26, 2020. (AP PhotoGerald Herbert)

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New Orleans Pelicans guard Josh Hart bears a memorial message on his shoes for former NBA great Kobe Bryant, who died today in a helicopter crash, in the first half of an NBA basketball game against the Boston Celtics in New Orleans, Sunday, Jan. 26, 2020. (AP PhotoGerald Herbert)

New Orleans Pelicans guard Josh Hart bears a memorial message on his shoes for former NBA great Kobe Bryant, who died today in a helicopter crash, in the first half of an NBA basketball game against the Boston Celtics in New Orleans, Sunday, Jan. 26, 2020. (AP PhotoGerald Herbert)

Williamson played his most minutes yet in his third game back from arthroscopic knee surgery performed the day before the regular season opened. He had played the first five or so minutes of each quarter in his first two games, but the Pelicans made an adjustment to his fourth-quarter usage to allow the NBA's top overall draft choice out of Duke to be on the court for the final minutes Sunday.

New Orleans Pelicans forward Zion Williamson (1) shoots against Boston Celtics center Daniel Theis (27) in the first half of an NBA basketball game in New Orleans, Sunday, Jan. 26, 2020. (AP PhotoGerald Herbert)

New Orleans Pelicans forward Zion Williamson (1) shoots against Boston Celtics center Daniel Theis (27) in the first half of an NBA basketball game in New Orleans, Sunday, Jan. 26, 2020. (AP PhotoGerald Herbert)

It paid off. Williamson scored eight points in the final three minutes — highlighted by a dunk on a baseline cut as he was fouled — and the Pelicans pulled away.

Kemba Walker scored 35 points, Gordon Hayward 23 and Jaylen Brown 20 for the Celtics, who fell behind for good in the first quarter and trailed by as many as 23 in the third quarter.

Boston hit just 16 of its first 43 shot — including 3-of-17 shooting from 3-point range — during the first half. New Orleans took advantage, opening a 62-42 lead by halftime.

New Orleans Pelicans center Derrick Favors (22) slam-dunks over Boston Celtics center Daniel Theis in the first half of an NBA basketball game in New Orleans, Sunday, Jan. 26, 2020. (AP PhotoGerald Herbert)

New Orleans Pelicans center Derrick Favors (22) slam-dunks over Boston Celtics center Daniel Theis in the first half of an NBA basketball game in New Orleans, Sunday, Jan. 26, 2020. (AP PhotoGerald Herbert)

Seven Pelicans players combined for 10 3-pointers in the opening half, with Ingram, Holiday and Lonzo Ball each hitting two.

Williamson scored nine points while playing 12:26 through the first two quarters. His early highlights included an alley-oop layup on a long lob from Ball as Williamson raced down the lane in transition. He would have scored more if he hadn't missed four of his first five free throws.

New Orleans led by 23 early in the third quarter and was still up by 18 when Williamson soared to the rim over Boston's Vincent Poirier to slam back Redick's missed 3.

New Orleans Pelicans center Derrick Favors (22) is fouled as he goes to the basket between Boston Celtics guard Jaylen Brown (7) and center Daniel Theis in the first half of an NBA basketball game in New Orleans, Sunday, Jan. 26, 2020. (AP PhotoGerald Herbert)

New Orleans Pelicans center Derrick Favors (22) is fouled as he goes to the basket between Boston Celtics guard Jaylen Brown (7) and center Daniel Theis in the first half of an NBA basketball game in New Orleans, Sunday, Jan. 26, 2020. (AP PhotoGerald Herbert)

Soon after, Walker hit a 3 and added free throws during a 7-0 mini-run that pulled Boston to 87-79.

In the fourth quarter, Josh Hart and Redick missed consecutive breakaway layups and then Marcus Smart scored inside while being fouled by Williamson to cut it to 97-91. But Redick followed with a 3 and Williamson scored on a drive from the top of the key to make it 102-91 with 8:20 to go.

Boston struggled to stay within 10 after that.

Boston Celtics center Daniel Theis (27) goes to the basket over New Orleans Pelicans center Jaxson Hayes (10) in the first half of an NBA basketball game in New Orleans, Sunday, Jan. 26, 2020. (AP PhotoGerald Herbert)

Boston Celtics center Daniel Theis (27) goes to the basket over New Orleans Pelicans center Jaxson Hayes (10) in the first half of an NBA basketball game in New Orleans, Sunday, Jan. 26, 2020. (AP PhotoGerald Herbert)

TIP-INS

Celtics: F Jayson Tatum was inactive because of an illness and right groin strain. ... C Enes Kanter missed his second straight game with a bruised right hip. ... Daniel Theis scored 15 points. ... The Celtics shot 8 of 33 from 3-point range.

Pelicans: Outrebounded Boston 54-37. ... Combined for 16 3s on 36 attempts, with Holiday hitting four while Redick and Ingram made three apiece. ... Won convincingly despite missing 10 of 29 free throws and committing 20 turnovers. ... Williamson committed four turnovers and missed five of eight free throws.

Boston Celtics guard Marcus Smart (36) shoots against New Orleans Pelicans guard E'Twaun Moore (55) in the first half of an NBA basketball game in New Orleans, Sunday, Jan. 26, 2020. (AP PhotoGerald Herbert)

Boston Celtics guard Marcus Smart (36) shoots against New Orleans Pelicans guard E'Twaun Moore (55) in the first half of an NBA basketball game in New Orleans, Sunday, Jan. 26, 2020. (AP PhotoGerald Herbert)

UP NEXT

Celtics: Visit Miami on Tuesday night.

Pelicans: Visit Cleveland on Tuesday night.

More AP NBA: https://apnews.com/NBA and https://twitter.com/AP_Sports

Boston Celtics guard Kemba Walker (8) goes to the basket between New Orleans Pelicans center Derrick Favors (22) and guard Josh Hart (3) in the first half of an NBA basketball game in New Orleans, Sunday, Jan. 26, 2020. (AP PhotoGerald Herbert)

Boston Celtics guard Kemba Walker (8) goes to the basket between New Orleans Pelicans center Derrick Favors (22) and guard Josh Hart (3) in the first half of an NBA basketball game in New Orleans, Sunday, Jan. 26, 2020. (AP PhotoGerald Herbert)

New Orleans Pelicans guard Josh Hart bears a memorial message on his shoes for former NBA great Kobe Bryant, who died today in a helicopter crash, in the first half of an NBA basketball game against the Boston Celtics in New Orleans, Sunday, Jan. 26, 2020. (AP PhotoGerald Herbert)

New Orleans Pelicans guard Josh Hart bears a memorial message on his shoes for former NBA great Kobe Bryant, who died today in a helicopter crash, in the first half of an NBA basketball game against the Boston Celtics in New Orleans, Sunday, Jan. 26, 2020. (AP PhotoGerald Herbert)