Tatum and Jaylen Brown played the entire second half as Boston fought back against a feisty Philadelphia squad that shot 46.9 percent from 3-point range without three usual starters including Joel Embiid and Paul George. Ultimately, Boston’s hot shooting and improved defensive intensity turned the game around after Mazzulla’s halftime speech.

Boston Celtics head coach Joe Mazzulla loves to push his players, and his halftime challenge sparked the team's comeback win over the 76ers on Sunday.