Donovan Mitchell and the Cavaliers took the home-court advantage with a Game 2 victory in Boston, the same way Luka Doncic and the Mavericks did in Oklahoma City.

Now the Cavs and Mavs will try keep that edge against the top seeds in each conference in their respective Game 3s at home Saturday.

The Celtics, who had the best record in the NBA, had the same problem in the first round, losing Game 2 to the Heat before winning the final three games of the series.

“Nobody’s in there defeated or deflated,” said Jayson Tatum, who scored 25 points in the Celtics’ 118-94 loss. “You never want to lose in the playoffs. We can learn from it.”

It’s a repeat for the Mavs, too. They, seeded fifth in the Western Conference, lost the series opener at the Clippers before getting the road split in what ended up being a six-game victory.

“It doesn’t change anything,” said Tim Hardaway Jr., who had his playoff high with 17 points in the Mavs’ 119-110 victory. “We’re going to take their best shot each and every step of the way.”

The Celtics’ outside shooting was the biggest issue in Game 2. They went 8 of 35 behind the arc — 2 of 18 in the second half.

“Overall we just missed some shots and let it translate, and in the playoffs that can’t happen,” said Jaylen Brown, who missed all six 3s.

The Cavs, seeded fourth in the East, played freely and fearlessly in Game 2, especially Evan Mobley, who finished with 21 points, 10 rebounds, five assists and two blocks while playing center with Jarrett Allen again out with bruised ribs. Mobley is the first Cavs player with a 20-10-5 playoff game since LeBron James.

“He was aggressive, dominant and then it continued through everybody else,” Mitchell, who scored 29 points, said of his 22-year-old teammate. “That was big time.”

Doncic, who has played with a sprained right knee since Game 3 against the Clippers, was shooting 39.5% overall and 24% from 3-point range before going 11 of 21 and 5 of 8 in a 29-point performance against the Thunder.

Kyrie Irving had just the third single-digit scoring game of his 82-game playoff career with nine points, but seemed to sense his shot was off and had just eight attempts, while playing the same solid defense he has most of this postseason and leading the Mavs with 11 assists.

Carlisle fined by NBA for criticizing refs, implying bias against small markets: Pacers coach Rick Carlisle was fined $35,000 by the NBA on Friday for criticizing the officials and “questioning the integrity of the league” with his pleas for fairness for small-market teams.

Carlisle made his comments after the Pacers’ 130-121 loss to the Knicks on Wednesday. He was called for two technical fouls and ejected late in the game as the Pacers fell into a 2-0 hole in the Eastern Conference semifinals.

Carlisle complained about a number of missed calls, which the Pacers subsequently sent to the league for review, and implied a bias in favor of New York.

“Small-market teams deserve an equal shot,” he said. “They deserve a fair shot no matter where they are playing.”