LeBron James embarrassed every defender Boston threw at him and Cleveland picked up where it left off following a long layoff, rolling to a 117-104 victory Wednesday night in Game 1 of the Eastern Conference finals.
James had 38 points, nine rebounds and seven assists.
Kevin Love added a playoff career-high 32 points and had 12 rebounds to help the Cavaliers improve to 9-0 in the first three rounds of the playoffs. They opened 10-0 last season en route to their first NBA title.
James scored at will in the first half and the Cavs built a 26-point lead. Love opened up the floor for James, burying outside jumpers and forcing Boston to leave defenders one-on-one with James.
Avery Bradley and Jae Crowder led the Celtics with 21 points each. Isaiah Thomas had 17 points. Coming off a Game 7 victory over Washington on Monday night, Boston missed 11 of its first 14 shots.
Since Game 5 of NBA finals, Cleveland has won a franchise-record 12 straight playoff games.
Game 2 is Friday night in Boston.