BOSTON — Joel Embiid and the Philadelphia 76ers advanced to the Eastern Conference semifinals, beating the Jayson Tatum-less Boston Celtics 109-100 on Saturday night to complete the NBA’s 14th comeback from a 3-1 deficit.

Embiid finished with 34 points, 12 rebounds and six assists. Tyrese Maxey added 30 points, 11 rebounds and seven assists. V.J. Edgecombe finished with 23 points and Paul George had 13.

Philadelphia, the No. 7 seed, will visit No. 3 New York on Monday in Game 1 of the second round.

The Sixers franchise, including its time as the Syracuse Nationals, improved to 2-10 all-time in road Game 7s. Their only other win came in 1982 at Boston Garden.

Jaylen Brown led Boston with 33 points and nine rebounds. Derrick White had 26 points, including five 3-pointers. Neemias Queta finished with 17 points and 12 rebounds, but only five players scored for the Celtics. They struggled from the 3-point line for the third straight game, shooting 13 of 49.

The second-seeded Celtics made their earliest exit from the playoffs since the 2020-21 season. Boston fell to 32-1 when leading a series 3-1.

The Celtics played without Tatum after he was ruled out about 90 minutes before tipoff because of left knee stiffness.

Philadelphia led for all but 31 seconds, increasing a five-point halftime edge to 18 points in the third quarter.

It was down to 13 at the start of the fourth, and Boston opened the quarter on a 16-4 run to pull within 92-91.

Philadelphia got small cushions, with the Celtics cutting it to a point three additional times but missing several chances to take the lead.

The 76ers were ahead 101-98 when Maxey got free for a layup with 1:15 remaining. Boston missed its next four shots, and Philadelphia pushed it to 105-98 on a pair of free throws by Maxey.

Coach Joe Mazzulla said Tatum came to the team facility Saturday with knee discomfort, and the medical team decided for him not to play. Tatum left Game 6 in the third quarter for unspecified treatment to his left calf. Mazzulla downplayed the significance, saying initially Tatum would play in Game 7.

With Tatum out, Mazzulla made radical changes to the starting lineup, opting to start Baylor Scheierman, Luka Garza and Ron Harper Jr. alongside Brown and White.

It marked the first time that the group started together this season.

It ultimately made for a slow start to the game for the Celtics, who quickly fell into a 9-0 hole.

Mazzulla made his first substitution at the 7:58 mark of the opening quarter, inserting Payton Pritchard for Harper. Queta subbed for Garza a little over two minutes later. Sam Hauser replaced Scheierman at 4:39.

Philadelphia led by as many as 15 and carried a 32-19 advantage into the second quarter.

Unlike in their losses in Games 5 and 6, the Celtics weren’t as quick to fire up 3s, instead opting to attack the interior of Philadelphia’s defense to get easier looks.

They began to gain traction in the second quarter, with Scheierman and Hugo Gonzalez injecting some energy on the floor with their hustle and scrappiness. Boston started the quarter on an 18-4 run to take its first lead of the night, 37-36, on a 3-pointer by Pritchard.

But the 76ers withstood the punch and took a 55-50 edge into halftime.