Boston Celtics head coach Joe Mazzulla said he is enjoying himself amid the added pressures of life as the defending NBA champions.

and the Celtics had been outscored by 10.6 points per 100 possessions with that unit on the court. Boston also came in with a 4-4 record in games that group started (23-7 in all other contests).

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