Pascal Siakam and Precious Achiuwa scored 13 points apiece and Toronto used an early burst in overtime to beat Boston 125-119 on Wednesday night.
Josh Jackson also had 13 points for the Raptors. Siakam recorded six rebounds and Achiuwa seven boards as the Raptors improved to 2-0 in the preseason.
Jaylen Brown led the Celtics with 23 points and Sam Hauser had 22, connecting on 8 of 12 shots, including 5 of 8 from outside the arc. Jayson Tatum finished with 18 points and 10 rebounds for Boston, now 1-1 in the preseason.
Payton Pritchard scored 17 points and had five assists
The teams were tied at 110 at the end of regulation after Jeff Dowtin (10 points) converted a 9-footer for the Raptors. Pritchard’s 18-footer was off the mark as time in regulation ran out, sending the game to the extra period.
The Raptors outscored the Celtics 11-4 to open overtime and never relinquished the lead.