Kyrie Irving had 30 points and 11 assists as Boston overcame big games from Oklahoma City stars Paul George and Russell Westbrook to snap the Thunder’s seven-game win streak in a 134-129 thriller on Sunday.
Boston has won four straight since a 115-111 home loss to the Golden State Warriors on Jan. 26 and has won nine of its last 10 games overall.
Marcus Morris had 19 points, Marcus Smart added 18 and seven assists and Daniel Theis had 14 off the Celtics bench.
George scored 37 points and Russell Westbrook notched his sixth straight triple-double and 19th of the season with 22 points, 16 assists, and 12 rebounds.
Steven Adams and Dennis Schroeder each had 16 points for Oklahoma City, and Jerami Grant scored 15.
Oklahoma City suffered its first loss since a 138-128 overtime setback against the Los Angeles Lakers on Jan. 17.
Westbrook made two free throws to pull Oklahoma City within 127-125 with 45.9 seconds remaining after Boston had led by six with 1:27 to go.
Irving’s driving finger-roll with 23.3 seconds left put Boston up by four, but Grant answered with a 3-pointer to bring the Thunder within 129-128.
Oklahoma City squandered a chance to take the lead after Jayson Tatum missed one of two free throws. Irving stripped Westbrook with 8.1 seconds on the clock and Horford got the ball back to Tatum, who sealed the win at the line.
Irving, George, and Westbrook combined for 89 points in the nationally-televised affair, while Celtics’ Al Horford had 17 points and nine assists.
The Thunder next host the Orlando Magic on Tuesday night, while the Celtics on the same night will visit the Cleveland Cavaliers before taking on the Los Angeles Lakers on Thursday.