Photo: Boston Celtics/Twitter

The Philadelphia 76ers rallied without big man Joel Embiid to beat the Boston Celtics 119-115 in Game 1 of the Eastern Conference semifinals on Monday night. After the game, the Celtics head coach Joe Mazzulla was quick to take ownership after his team let the game slip away in their loss to Doc Rivers’s squad.

“I got to be better,” Mazzulla said. “On certain play calling, getting out spacing right. That’s an area I can be better at.”