Joe Mazzulla’s Christmas greetings were costly. The NBA fined the Boston Celtics coach $35,000 on Saturday “for aggressively pursuing and directing inappropriate language toward a game official” at the end of his team’s loss to the Chicago Bulls on Thursday night.

The NBA announced on Saturday that Mazzulla was fined $35,000 for "aggressively pursuing and directing inappropriate language toward a game official" after the Celtics lost 108-117 to the Chicago Bulls. Once the buzzer sounded, Mazzulla went straight to the ref and could be seen yelling and pointing in anger.

Mazzulla was called for a technical foul after approaching the officials to argue over a call. Jaylen Brown and Jayson Tatum were also called for techs in the waning minutes of Thursday's loss.