"Our guys kept their composure," Sixers coach Doug Collins said.
When the Sixers made another late surge to get to 92-90 on Young's dunk with 2:54 remaining, the Raptors countered with a jumper by Davis for a four-point lead with 2:09 left.
Young's dunk with 10.6 seconds left pulled the Sixers to 94-92. Anderson converted a pair of free throws with 8.8 seconds to go for a 96-92 lead.
But it wasn't over.
A basket by Hawes cut it to 96-94 with 5 seconds left, and a turnover by Calderon gave the Sixers one last chance. Holiday came through and tied it.
In the extra session, Holiday completely took charge and showed why he appears worthy of his first All-Star selection. He hit a pair of jumpers followed by a 3-pointer and a layup for a 105-99 lead.
"He's the closer," Hawes said. "We put the ball in his hands. He made all the right decisions and all the right moves down the stretch."
The Raptors led by as many as 17 points in the first half and cruised to a 60-43 advantage heading into the locker room thanks to 59 percent shooting (24 of 41).
But it didn't last.
"In the NBA, it's hard to play with a lead," Lowry said. "Everyone always says that. But when you want to become an elite team and that team wants to win and make the playoffs, you don't have an ease mode. You have to go hard and try to win every game and keep it going."
NOTES: The Raptors shot 12 of 17 (71 percent) in the first quarter. ... Sixers guard Jason Richardson started despite having fluid drained from his left knee on Thursday. ... Sixers backup center Kwame Brown missed the game because of a sinus infection. ... The 76ers announced that they raised $189,012 to benefit the American Red Cross through their "Operation Rebound" relief effort.