Photo: Chris O'Meara/Associated Press

Boston Celtics big man Tristan Thompson said he looked in the mirror last week and told himself to get back to being himself, after playing tentative trying to fit in with new Celtics teammates and recovering from an offseason hamstring injury.

Thompson revealed the pick-up origin of the injury that cost him training camp, before a COVID layoff for the Celtics further diminished his ability to get live action as well as a Boston frontcourt full of four competitive players.

The 29-year-old center scored 17 points with 10 rebounds against the Sacramento Kings, posting up and looking for his shot, while the defense remains a work in progress for him and the whole team in terms of every possession commitment and knowing personnel.