Amir Johnson hit a pair of free throws with 2.7 seconds left, lifting the Toronto Raptors to a 102-101 victory against the Boston Celtics on Sunday at Air Canada Centre.

The Celtics (9-4) suffered a stunning loss to Oklahoma City on Friday, even with the Thunder missing leading scorer Kevin Durant, and they followed it up with another one against the Raptors.

Boston trailed 94-85 with 7:31 left, but the Celtics reeled off a 13-0 run to regain the lead. They couldn't hold it, though, as Leandro Barbosa's steal with 12 seconds left led to Johnson grabbing an offensive rebound and getting to the line for the winning free throws.

The Celtics had a chance to win it at the buzzer, but Paul Pierce missed a 16-foot jumper.

Andrea Bargnani scored 29 points to lead the Raptors. Bargnani has scored 20 or more points in nine of Toronto's 14 games, including each of the Raptors' three consecutive wins.

Johnson added 17 points and 11 rebounds for the Raptors (5-9), and Sonny Weems had 16 points and five rebounds.

Celtics point guard Rajon Rondo sat out with a strained hamstring. Nate Robinson started in place of Rondo and scored a team-high 22 points on 8-of-14 shooting.

Pierce and Ray Allen scored 19 apiece for the Celtics.