Kyrie Irving and Marcus Morris each had 20 points, and the Boston Celtics rallied in the second half to beat the Indiana Pacers 84-74 on Sunday to take a 1-0 lead in their first-round playoff series.

Jayson Tatum finished with 15 points. Al Horford added 10 points and 11 rebounds, and Gordon Hayward had 10 points. It was the first playoff game since 2017 for Irving and Hayward after each missed last year’s postseason with injuries.

Game 2 is Wednesday night in Boston.

Boston Celtics' Marcus Morris, left, drives past Indiana Pacers' Darren Collison during the second quarter in Game 1 of a first-round NBA basketball playoff series, Sunday, April 14, 2019, in Boston. (AP Photo/Winslow Townson)
Boston Celtics’ Marcus Morris, left, drives past Indiana Pacers’ Darren Collison during the second quarter in Game 1 of a first-round NBA basketball playoff series, Sunday, April 14, 2019, in Boston. (AP Photo/Winslow Townson)

The Pacers led by 11 points in the first half but had just eight points in the third quarter. The Celtics capitalized and led by as many as 22 in the fourth. Indiana scored 29 points in the second half, and the quarter and half were both its worst of the season.

Cory Joseph had 14 points for the Pacers. Bojan Boganovic was the lone Pacers starter in double figures with 12 points.

Celtics coach Brad Stevens and Pacers coach Nate McMillan both said before the series that the more physical team would have the edge.

New England Patriots owner Robert Kraft, center, cheers on the Boston Celtics with Celtics owner Wyc Grousbeck, left, during the third quarter in Game 1 of a first-round NBA basketball playoff series between the Celtics and the Indiana Pacers, Sunday, April 14, 2019, in Boston. (AP Photo/Winslow Townson)
New England Patriots owner Robert Kraft, center, cheers on the Boston Celtics with Celtics owner Wyc Grousbeck, left, during the third quarter in Game 1 of a first-round NBA basketball playoff series between the Celtics and the Indiana Pacers, Sunday, April 14, 2019, in Boston. (AP Photo/Winslow Townson)

After a shaky start, it turned out to be Boston.

Indiana led by as many as 11 in the first half before Boston opened the third quarter with a 22-3 run to take a 60-48 lead. The Pacers didn’t get their first field goal of the second half until Cory Joseph dropped in a layup with 3:38 left in the third. They finished the quarter 2 for 19 from the field.

Boston’s run included a brief appearance by Celtics legend and former Pacers front office executive Larry Bird, who was shown on the big screen during a timeout.

Indiana Pacers' Tyreke Evans throws a pass over Boston Celtics' Al Horford during the second quarter in Game 1 of a first-round NBA basketball playoff series, Sunday, April 14, 2019, in Boston. (AP Photo/Winslow Townson)
Indiana Pacers’ Tyreke Evans throws a pass over Boston Celtics’ Al Horford during the second quarter in Game 1 of a first-round NBA basketball playoff series, Sunday, April 14, 2019, in Boston. (AP Photo/Winslow Townson)

The third period ended with Terry Rozier connecting on an acrobatic 3-pointer with 0.1 seconds remaining to put the Celtics ahead 64-53. The lead grew to 84-62 on a 3-pointer by Tatum with 3:34 remaining.

Stevens went with Jaylen Brown in the starting lineup in place of Marcus Smart, who is out with a torn left oblique.

But after Boston committed four turnovers in the first four minutes of the game, Stevens quickly adjusted, inserting Morris and Hayward.

Boston Celtics' Kyrie Irving shoots against the Indiana Pacers during the first quarter in Game 1 of a first-round NBA basketball playoff series, Sunday, April 14, 2019, in Boston. (AP Photo/Winslow Townson)
Boston Celtics’ Kyrie Irving shoots against the Indiana Pacers during the first quarter in Game 1 of a first-round NBA basketball playoff series, Sunday, April 14, 2019, in Boston. (AP Photo/Winslow Townson)

The change paid off with Morris connecting on 3 of 4 field-goal attempts in the period, including two 3-pointers, and scoring 12 points. No other Celtics player had more than two points.

The Celtics continued turning the ball over, though. They finished the first half with 10 turnovers, which led to 11 Pacers points.

TIP-INS

Boston Celtics' Kyrie Irving drives on Indiana Pacers' Bojan Bogdanovic during the first quarter in Game 1 of a first-round NBA basketball playoff series, Sunday, April 14, 2019, in Boston. (AP Photo/Winslow Townson)
Boston Celtics’ Kyrie Irving drives on Indiana Pacers’ Bojan Bogdanovic during the first quarter in Game 1 of a first-round NBA basketball playoff series, Sunday, April 14, 2019, in Boston. (AP Photo/Winslow Townson)

Pacers: Went 12 of 21 from the free throw line (57.

Celtics: Outrebounded the Pacers 55-42.

PATRIOTS’ KRAFT COURTSIDE

Patriots team owner Robert Kraft sat courtside beside Celtics co-owner Wyc Grousbeck. Kraft was charged with two counts of solicitation in January after police said he twice paid to have sex with employees at a Florida spa.

UP NEXT

Boston hosts Game 2 on Wednesday.

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