The Celtics recovered from a 15-point deficit to defeat the Cavaliers 120-113 at TD Garden on Tuesday night.

Boston’s Jaylen Brown (25 points) and Jayson Tatum (25 points, 10 rebounds) led the charge in the rally that gave the Celtics their 11th straight home victory to start the season. Kristaps Porzingis also rebounded from a poor first half to score 21 points and grab 10 rebounds, putting all five Boston starting in double figures. Donovan Mitchell led all scorers with 29 points in the loss.

Boston fell behind 18-4 after a poor shooting start, but rediscovered their groove midway through the first half and began to chip away at Cleveland’s lead. The comeback set up a tense second half in which stars from both teams traded buckets before the Celtics used a 9-0 run midway through the frame to pull away.

The victory was Boston’s second in a row and increased the team’s record to 11-0 at TD Garden during a five-game homestand. On Thursday night, the Celtics will face the Cavaliers again.

Here are four key lessons from the Celtics’ victory:

The Celtics get off to a slow start: With a three-day rest and only one game in the previous week, Boston appeared rusty for much of the first quarter. Cleveland jumped off to an 18-4 lead, digging an early hole against a Celtics team that struggled to defend the 3-point line and the paint early on against Donovan Michell and Darius Garland. The Celtics were even worse offensively, making only four of their first 18 attempts, including nine straight misses from beyond the arc. Jaylen Brown (10 points in the first quarter) kept Boston afloat until the bench unit began to chip away at the Cavs’ lead in the second quarter.

Jaylen Brown overcomes ankle injury to have a productive night: At the end of the first half, the Celtics All-Star made the TD Garden a little apprehensive when he rolled his ankle on an ugly layup. On the next possession, he limped to the locker room after pulling himself out of the game. The agony was short-lived, as Brown returned to the floor to start the second half and scored the first five points of the third quarter for the hosts. The stretch highlighted another productive December night for the All-Star, who shot over 50% from the field for the third straight game.

The Celtics get back into the game at the free throw line: Before the season, Joe Mazzulla talked a lot about attempting to win games in other ways when the team’s shooting isn’t there. The hosts demonstrated that approach on Tuesday night, overturning a 15-point first-half deficit partly due to their tenacity. In the first half, Boston outscored its opponents 16-2 at the free throw line, with Jayson Tatum leading the way with his assertiveness against smaller and slower-footed defenders. That mindset also left perimeter kickouts open for Boston all night, as the club recovered from nine straight 3-point misses to start the game to end at 40.9 percent on the night, despite the Cavs defense collapsing on paint drives.

Celtics remain unbeaten at home: The hosts faced their biggest test of the season at TD Garden, digging themselves a 15-point hole in the first quarter against a playoff opponent, with Donovan Mitchell putting on a show early. The Celtics, on the other hand, were able to right the ship in this one, steadying their defense while receiving a balanced scoring attack from the starters to attack the Cavs’ weak places. It was a formulaic approach, but it was indicative of a better Celtics team this year that is finding new ways to win at home. More difficult tests lie this week, including a rematch against the Cavs and two straight against the Magic, but it was impressive to see Boston win despite poor shooting performances from Tatum and Porzingis.