The Boston Celtics are still finding themselves as the calendar turns to 2019.



A shaky 10-10 start was followed by an eight-game winning streak, then three losses in a row, two consecutive days of team meetings and now back-to-back victories, including Tuesday’s Christmas Day win over Philadelphia. In meetings last Friday and Saturday, Celtics players challenged each other about playing together and not for individual accomplishments. Celtics general manager Danny Ainge and his front office have built one of the deepest, most talented teams in the NBA, but figuring out roles is critical and sacrifice is important within any championship contender. The Celtics’ challenges have centered on players across the roster playing in a winning style and accepting roles.



“Truth is, I’m not necessarily playing the minutes that I want, the role that I want, that selfishly I would want for myself,” Celtics star Kyrie Irving said last Friday.