Tyrese Haliburton made a go-ahead 3-pointer midway through the fourth quarter that sparked a decisive burst for the visiting Indiana Pacers, who stunned the top-seeded Cleveland Cavaliers 121-112 on Sunday night in Game 1 of the Eastern Conference semifinals.

Haliburton finished with 22 points and 13 assists, and he also made key plays on the defensive end, blocking a 3-point attempt by Max Strus with 2:12 left and converting it into a layup for a 10-point lead.

Andrew Nembhard added a playoff career-high 23 points and made five 3-pointers for the fourth-seeded Pacers, who finished 19 of 36 beyond the arc. Cleveland, which was second in the NBA during the regular season with 15.9 3s per game, was 9 of 38.

Donovan Mitchell led the Cavaliers with 33 points and broke Michael Jordan’s NBA playoff record with his eighth straight game of at least 30 points in a series opener.

Evan Mobley added 20 points and 10 rebounds for the Cavaliers, who trailed most of the game, took the lead in the fourth and then couldn’t close it out.

Indiana had a 12-point lead in the third before Cleveland rallied. The Cavs went ahead 102-101 on a free throw by Strus before Haliburton’s 3 ignited a 15-4 run.

All five Indiana starters scored in double figures. Aaron Nesmith and Pascal Siakam had 17 points apiece.

Game 2 is Tuesday night in Cleveland.

Celtics’ Holiday expected back against Knicks: Celtics guard Jrue Holiday is expected to return from a strained right hamstring when Boston opens its Eastern Conference finals series against the Knicks today.

No Celtics players were listed on the injury report Sunday, meaning they could be at full strength when Game 1 tips off. It’s the first time Holiday hasn’t been on the injury report since he missed the final three games of Boston’s first-round series win over Orlando in five games.

Coach Joe Mazzulla said Holiday was able to “work on everything he wanted to work on” during Boston’s practice session Saturday.

One of the Celtics’ top defenders and facilitators on offense, Holiday averaged 10 points, 5.5 assists and 3.5 rebounds in the opening two games of the Magic series.

Also not listed on Boston’s latest report is Jaylen Brown, who has been dealing with a right knee injury that sidelined him for the Celtics’ final three regular-season games.