Kyrie Irving and Marcus Morris each scored 20 points, and the Boston rallied in the second half to the beat Indiana Pacers 84-74 on Sunday in Game 1 of 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.

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. The 29 points that Indiana scored in the second half were its worst of the season.

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

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 Joseph dropped in a layup with 3:38 left in the third. They finished the quarter 2 for 19 from the field.

The Pacers went 12 of 21 from the free throw line (57%) and the Celtics outrebounded the Pacers 55-42.

Game 2 is Wednesday night in Boston.