Boston countered and the late fourth quarter was a tightly contested battle. Fred VanVleet saw extra court time with Green out.
Anthony Davis had 43 points and 17 rebounds to rally the Pelicans from a 19-point deficit in a 129-124 win against the Knicks.
Joel Embiid, who scored 12 of his 23 points in the fourth quarter, capped the scoring with two free throws and the Sixers improved to 10-7. When he gets into that mode, the whole arena knew where we were going, and so did the Raptors.
Embiid had seven rebounds, three blocked shots and two steals despite playing just 26 minutes because of foul trouble and Simmons finished with 10 points, eight rebounds and eight assists. The home team has won nine straight matchups.
The 31-year-old is averaging 9.5 points, 4.0 rebounds and 1.3 assists over 14 games this season, his first in Toronto after being acquired from the San Antonio Spurs over the summer.
"We've made a lot of mistakes", starting forward Pascal Siakam said before Friday morning's shootaround at TD Garden.
Hayward hit a pair of free throws to open the overtime, Ibaka answered with a jumper and from there it was all Celtics.
But they out-scored Toronto 29-25 in the final frame, knotting the score at 90-90 on Irving's three-pointer. "We got kind of stalled in that third quarter, but we picked it up again down the stretch".
The Jazz dug in to make it close, and the teams traded the lead six times in the fourth quarter. But Tatum wound up kicking him in the head as he came back down.
Irving then contributed to every Celtics basket in overtime, scoring four and handing out four assists.
And as the icing on the cake, the Raptors also lost a player to injury and have a back-to-back coming in Chicago tomorrow, where Bulls guard Justin Holiday is now apparently doing Klay Thompson cosplay.
The Celtics had been in a mini-funk the past couple of weeks, losing four of their past six, and they entered the night 24th in the National Basketball Association in scoring (105.6 points per game) and 28th in shooting percentage (.429).