After a 41-point rout of the Charlotte Hornets in the opener, the C's took an 18-point lead into the fourth quarter vs. the Toronto Raptors on Wednesday night.
Boston's reserves were unable to finish the job as Toronto stormed back to force overtime and earn a 125-119 win at TD Garden.
Despite the loss, the Celtics' stellar ball movement and 3-point shooting made for another encouraging performance.
They dished out 31 assists on 44 field goals and hit 16 shots from beyond the arc. They also did a better job of taking care of the basketball as they turned the ball over only 10 times to Sunday's 25.
Here are our takeaways from the C's defeat. They'll visit the Hornets for a preseason rematch Friday at 7:30 p.m. ET right here on NBC Sports Boston.
With Danilo Gallinari expected to miss the entire season due to a torn ACL, the Celtics could use another scorer off the bench. Sam Hauser showed again that he is ready to assume that role.