NBA: Boston Celtics at Philadelphia 76ers

Boston Celtics forward Gordon Hayward (20) moves to the basket against the Philadelphia 76ers during the third quarter at Wells Fargo Center. 

Gordon Hayward scored 26 points off the bench to lead the visiting Boston Celtics past the Philadelphia 76ers 112-109 on Tuesday in a game full of playoff atmosphere.

Al Horford scored 23 points while Jayson Tatum added 20 points and 10 rebounds as the Celtics snapped a two-game losing streak. All-Star guard Kyrie Irving sat out with an injured knee.

Joel Embiid had 23 points and 14 rebounds for his league-leading 47th double-double, and Jimmy Butler added 22 points and nine rebounds. Ben Simmons and JJ Redick scored 16 points each.

Trailing by three with 1.8 seconds left, Butler was unable to release a potential 3-pointer in time.

The Sixers had their two-game winning streak halted and lost their first game since acquiring Tobias Harris in a trade-deadline deal with the Los Angeles Clippers.

The Celtics jumped out to a 28-18 lead before the Sixers closed the first quarter with a 5-0 run to get within five.

Boston used an 8-0 spurt late in the second to take a 52-44 lead. Embiid knocked down a jumper to get the Sixers within 52-46 at halftime.

Horford, who received a technical foul early in the half, led the Celtics with 13 points. Butler paced the Sixers with 10 on 4-of-6 shooting.

The Sixers came out very aggressive on the defensive end, and it translated into a 20-4 run and a 64-56 lead midway through the third.

Boston later responded with an 11-2 run capped by a 3-pointer from Hayward for a 67-66 advantage with 2:55 left in the third.

Horford hit two late 3-pointers before Butler came back and converted a driving layup at the buzzer. The Celtics led 77-74 after three quarters.

The Celtics made six of their first seven shots in the fourth quarter to go ahead 90-81.

But Embiid made a trey, and the Sixers sliced the lead to 92-89 with 7:01 remaining.

After the Sixers tied the game at 94, Tatum and Terry Rozier each connected on a 3-pointer for a 100-94 Celtics lead with 5:17 left.

Embiid converted a three-point play with 2:11 left, and the Sixers regained the lead at 103-102.

Marcus Smart threw down a vicious dunk with 23.9 seconds left for a 108-104 Boston advantage, attacking Embiid -- who had five fouls at the time.

--Field Level Media