Before Thursday, LeBron James had pretty much mastered every opponent on every court in the NBA.

The lone exception was Boston. Including four games of the 2008 playoffs, the Celtics had beaten Cleveland nine straight on the parquet. And after one quarter, the Celtics certainly appeared headed for No. 10 with a 31-21 lead. But that’s when the Cavaliers, and specifically James and teammate Mo Williams, said enough was enough.

James had 36 and Williams canned four of his five 3-pointers in the second half as the Cavs ran away from the Celtics, 108-88, at TD Garden.

Afterward, he spoke to the great play of his team in the second half, what it was like to finally win in Boston and picking up the slack for the injured Shaquille O’Neal.