Nikola Mirotic admitted his confidence is down this season.

"I had that experience a lot before and the only way to get it back is to work hard," he said. "And stay positive. I need to stay positive. I need to forget what happened yesterday, what happened last week. So (Friday) is another chance in Boston. I know I need to be strong."

Mirotic set the bar high for himself by averaging 20.8 points in March last season as a rookie with the Chicago Bulls.

"Today, I'm not scoring easy baskets. I'm not running like before," he said. "I'm not making those open 3s. I'm not doing things in the low post. But if I can do it last year in March, I can do it this year, too. It's a little bit confidence, a little bit more working out, and I think it will come soon."