BOSTON (AP) — James Harden was asked for most of this season to be a facilitator for a 76ers team built around big man Joel Embiid.
With the MVP finalist sidelined for the opener of his team’s second-round playoff series with the Celtics, Philadelphia called on a vintage version of Harden.
Harden matched his playoff career high with 45 points and hit a go-ahead, step-back 3-pointer over Al Horford with 8.7 seconds left as the 76ers rallied without Embiid to beat Boston 119-115 in Game 1 of the Eastern Conference semifinals on Monday night.
Tyrese Maxey added 26 points and Tobias Harris finished with 18 for the Sixers, who made 17 3-pointers with Embiid watching from the bench. He sprained his right knee in Game 3 of Philadelphia’s first-round sweep of the Brooklyn Nets.
After the Sixers endured an early scoring onslaught from the Celtics, 76ers coach Doc Rivers said Harden was patient and knew when to attack and when to pass.
Rivers said having a week to prepare for the likelihood Embiid would be out was key.
Jayson Tatum led the Celtics with 39 points and 11 rebounds. Jaylen Brown added 23 points and Malcolm Brogdon finished with 20.
Harden previously scored 45 points for the Houston Rockets in a Western Conference Finals win over Golden State on May 25, 2015.
Trailing 117-115, the Celtics had one final chance and got the ball to Tatum, but he lost the ball to Paul Reed, who was fouled and hit a pair of free throws.
The game was tied at 87-all entering the back-and-forth final period.
Tatum gave the Celtics their final lead, 115-114, on a pair of free throws with 26.1 seconds left.
Before that, Boston took the shot clock down before Maxey intercepted a pass by Brogdon and drove in for a layup to put the 76ers in front, 114-113.
Boston led 108-107 when Harden was called for an offensive foul on Horford. On the ensuing possession, Horford found Marcus Smart, who was fouled on a layup. He completed the three-point play to make it 111-107.
Harden led the attack early for Philadelphia, hitting his first five attempts, including two 3s. Brown started 6 for 6 from the field for a Boston team that thrived without Embiid protecting the rim, going on an 11-0 run at one point.
Boston shot 74% for the half but took only a 66-63 lead into halftime after the 76ers went 11 for 19 (55%) from the 3-point line.