TORONTO — This time, the track meet only lasted for the first two quarters.

And then a grind.

As seemingly always is the case when the Miami Heat play the Toronto Raptors.

So even after going up 15 in the first quarter, 14 in the third and 10 early in the fourth, the Heat found themselves again fighting to the finish against the Raptors.

Having lost two of their previous three at a pace seemingly beyond their pedigree, the Heat this time stepped up defensively in the second half and got the halfcourt scoring needed in the fourth quarter to put it away in a 112-103 victory at Scotiabank Arena.

The Heat outscored the Raptors 48-37 in the second half, limiting Toronto to .326 shooting over the final two periods.

“I think any head coach would like to see that against a very talented, aggressive offensive team, holding them to under 40 points in that second half,” Heat coach Erik Spoelstra said. “I don’t know what the percentage was, but there were much better efforts. More commitment to do hard things.

“And then, you have to also make some plays offensively.”

Playing in the injury absences of starters Bam Adebayo, Tyler Herro and Haywood Highsmith, the Heat got across-the-board efforts, with several players dominating specific segments.

Forward Caleb Martin settled the offense early, closing with 24 points and 12 rebounds. Jimmy Butler scored and guided as needed, finishing with 19 points and eight assists. Jaime Jaquez Jr. sparked the bench with 15 points, and Duncan Robinson and Orlando Robinson played as closers.

Duncan Robinson closed with 21 points, seven assists, six rebounds. Orlando Robinson finished with 15 points and 12 rebounds.

The Heat closed with 33 assists to only seven turnovers.

Butler said the Heat again looked like the Heat.

“We got stops and we got out in the open floor and made some shots,” he said. “So whenever we do that, basketball looks good.”

Pascal Siakam led Toronto with 30 points, supported by 23 from OG Anunoby.

Five Degrees of Heat from Wednesday night’s game:

1. Closing time: The Heat raced to a 22-7 lead before closing the first period up 37-32, only to wind up down 66-64 at halftime, when their franchise-record streak of nine consecutive 30-point quarters ended after a 27-point second period.

The Heat then opened the third period with a 16-0 run that included Duncan Robinson’s first dunk since 2021-22. But the Raptors were just as strong at the close of the third, with the Heat going into the fourth up 87-84.

But after pushing to a double-digit lead early in the fourth, the Heat again found themselves in a clutch game, up five with five minutes to play and the lead then down to 97-94 with 3:56 left.

Eventually, a Duncan Robinson 3-pointer and a pair of Orlando Robinson baskets put the Heat up 104-96 with 2:12 to play, with a Duncan Robinson layup then making it 106-96 Heat with 1:43 left.

“You still have to roll up your sleeves defensively and commit to doing very difficult things in this league if you want to be very good on that end of the court, and I saw that in the second half,” Spoelstra said. “It was a shootout in the first half, so probably the fans loved it. We just mentioned at halftime, whichever team would get a hold of the defensive side of the floor would win this game in that second half.”

2. Starting revelation: With Adebayo and Highsmith out, the Heat opened with their 14th lineup in their 21 games, with Orlando Robinson starting in place of Adebayo at center, and with Martin starting in place of Highsmith at power forward. That was with Duncan Robinson again starting in place for Herro, as he has for the past month.

With the Heat staying smaller with Martin in place of Highsmith, Martin provided the needed spacing in such an alignment with a 3-of-4 start on 3-pointers, helping the Heat to an initial 14-5 lead. The Heat’s first five baskets were 3-pointers, before Martin ended that run with a driving layup.

“We just had a next man up mentality,” Martin said, “and I think a lot of guys showed that tonight. We had what we needed to do to get a tough win on the road.”

3. And keeps going: Martin closed the first quarter with 15 points and was up to 23 at halftime, the highest-scoring half of his career.

Martin’s previous season high was 22 points, which he eclipsed with  7:29 left in the second period, up to 14 shots at halftime,

He then slowed, with only one point in the second half.

His career high remains was 28 points on Dec. 8, 2021 against the Milwaukee Bucks.

He closed 4 of 7 on 3-pointers.

“He’s always been a very good three-point shooter,” Spoelstra said. “So when people sag off of him or pack the paint and try to get an extra body in front of Jimmy, he’s been able to capitalize on that.”

4. Robinson and Robinson: In the absence of Adebayo and Herro, a pair of Robinsons provided needed compensation.

Both played with confidence in the final period, with Orlando taking his play to the paint and Duncan again mixing and matching his shooting and cutting.

Both played as closers, and as exactly what the Heat needed after Martin cooled with his play.

Duncan Robinson had 10 points and three assists in the fourth.

“With Duncan, it’s not at all even a surprise anymore,” Spoelstra said. “He’s so skilled offensively and he fits with any unit.”

Orlando Robinson had nine points and six rebounds in the quarter, with both playing all 12 minutes of the period.

“He had a lot of big plays,” Spoelstra said. “The rebounding down the stretch, his defensive detail work was really good.”

Duncan Robinson said the two simply did as needed.

“Jimmy is our ‘closer’ or whatever you want to call it,” he said. “But he’s very selfless and he’s going to make the right play, so other guys can be the beneficiary of that.”

5. Jovic sighting: Nikola Jovic received his first playing time in four games in only his second appearance since Oct. 30, entering with 6:19 left in the second period.

Unlike previous outings, he entered at power forward instead of center, with Orlando Robinson already in the game.

“Those three minutes,” he said, “I was just trying to stay solid.”

Jovic’s stint lasted 3:18, scoreless with two rebounds and two fouls, before being replaced by Martin.

“I felt very comfortable with that,” Spoelstra said of Jovic’s lone stint. “I was going to do that earlier, in the first quarter. I would have felt more comfortable getting him in there in the first quarter, but Caleb was on such a run that I didn’t want to take him out.

“But Niko had a couple good moments. His rebounding, his size, I felt that we might have needed a little bit more size for just a small stretch and potentially a little bit of playmaking.”

The only available Heat players not to see action were Jamal Cain and Thomas Bryant.