Cleveland • Victor Oladipo scored 32 points and the Indiana Pacers held off Cleveland's second-half rally for a stunning 98-80 victory Sunday in Game 1 of the Eastern Conference series, handing LeBron James and the Cavaliers their first loss in the opening round in eight years.

Indiana was in control from the outset, opening a 21-point lead in the first quarter and leading by 23 in the third. The Cavs stormed back and got within seven, but Oladipo hit a big 3-pointer and Bojan Bogdanovic helped put Cleveland away with a 3 to make it 88-71.

The Pacers completely outplayed the three-time defending conference champions, whose turbulent regular season has carried over into the playoffs.

Game 2 is Wednesday night.

James scored 24 with 12 assists and 10 rebounds for his 20th career triple-double. But James got little help as Cleveland's four other starters — Kevin Love, Jeff Green, Rodney Hood and George Hill — combined for 25 points.

This is all new to James, who had won 21 consecutive first-round games and lost a postseason for the first time in his 13th playoffs. The 33-year-old is trying to get to his eighth straight Finals, and already the path is tougher than imagined.

Cleveland had won 14 straight first-round games, last losing on April 22, 2010, the last season of James' first stint with the Cavs.

Indiana was swept by Cleveland in last year's opening round. Those Pacers, though, didn't have Oladipo or the balance of this Indy squad, which may lack experience but not confidence.

Lance Stephenson, a longtime playoff nemesis for James, helped set the tone in the first quarter with a dunk he punctuated by throwing several punches into the padded basket stanchion.

The Pacers took the fight to the Cavs. They were more physical, more energetic and more composed.

Oladipo has become one of the NBA's rising stars, and after being a role player in Oklahoma City, he's Indiana's main attraction and looked like a seasoned star on the playoff stage. He made six 3-pointers, swiped the ball from James on two occasions and more than doubled his previous playoff scored high of 15.

The Cavs fell behind 33-12 during a strange first quarter that included Cleveland missing all eight 3-pointers, James not attempting his first field goal until 1:52 remained and fans in Quicken Loans Arena wondering what they were seeing.

As he does for every postseason, James shuts down all social media activities, a routine he calls Zero Dark 23 Mode. And this time, he began it Saturday by posting a quote on Instagram from Martin Luther King Jr: "Darkness cannot drive out darkness, only light can do that."

The Pacers drove him into a darker place.

TIP-INS

Pacers: Only have two starters __ Myles Turner and Thaddeus Young — from the team Cleveland swept last year. ... Oladipo wasn't seen as a franchise-changing player when Indiana acquired him along with Domantas Sabonis in the trade for Paul George. However, coach Nate McMillan said the guard wanted to prove himself and did with hard work. "He's a very coachable kid," McMillan said. "We've had many film sessions and one-on-one sessions to try to improve and he's shown that. This is a different season, a good opportunity for him to show where he's at again."... Indiana came in 15-6 in the playoffs when it wins the opener. The Pacers are 4-18 wheb losing Game 1.

Cavaliers: James surpassed Michael Jordan (2,188) for the second-most made field goals in playoff history. Kareem Abdul-Jabbar (2,356) tops the list. ... James dropped to 48-8 in first-round games. ... Coach Tyronne Lue started Hood over Kyle Korver, who has lingering soreness in his right foot and was on a minutes' restriction. Korver played just four minutes. ... Green was 0-for-7 from the field, 0-for-3 from the line and the Cavs were outscored by 15 when he was on the floor.

Celtics 113, Bucks 107, OT • In Boston, Al Horford had 24 points and 12 rebounds and the Boston Celtics overcame Khris Middleton’s long 3 that beat the fourth-quarter buzzer, topping Milwaukee in overtime to open their playoff matchup.

The Celtics led 99-96 with 0.5 seconds left in regulation when Middleton took an inbounds pass on the far right wing and hit a contested 35-footer to force OT.

Terry Rozier added 23 points, four rebounds and three assists for Boston in his first career playoff start. Jaylen Brown finished with 20 points. Rookie Jayson Tatum added 19 points and 10 rebounds.

Giannis Antetokounmpo led the Bucks with 35 points, 13 rebounds and seven assists before fouling out in overtime. Middleton had 31 points, eight rebounds and six assists. Malcolm Brogdon scored all 16 of his points after halftime for Milwaukee.

Game 2 in the best-of-seven series is Tuesday night in Boston.

An acrobatic, spinning layup by Tatum gave Boston a 108-105 lead in overtime.

It was 108-106 when Horford snared a rebound and got it ahead to Rozier, who was fouled. He made two free throws to put the Celtics in front 110-106 with 18.8 remaining.

Antetokounmpo made one of two foul shots with 14.8 seconds left, but he fouled out of the game while going for the rebound on his miss.

Rozier added three free throws to provide the final margin.