Giannis Antetokounmpo had 30 points and 14 rebounds, and Milwaukee celebrated its return to the Christmas schedule by beating the New York Knicks 109-95 on Tuesday.
Brook Lopez scored 20 points for the Bucks, who played on Christmas for the first time since 1977.
Malcolm Brogdon finished with 17 points for the Bucks.
Rookie Kevin Knox scored 21 points for the Knicks, who have lost six straight Christmas Day games.
It was only a seven-point game midway through the third quarter when Antetokounmpo began to seize control. His jumper followed by layup pushed the lead into double digits, and he scored 11 points in the Bucks' 36-point period that ended with them leading 84-68 cushion.
Noah Vonleh had 14 points and 15 rebounds, while Tim Hardaway Jr. had 14 points and 10 boards but shot just 4 for 18 for New York.
Kyrie Irving scored six of his 40 points in overtime, hitting back-to-back 3-pointers while leading Boston back from a five-point deficit as the Celtics beat the 76ers 121-114 on Tuesday night.
It came very close to not being so great for Boston, which needed Irving's fadeaway jumper from 13-feet out to tie it at 108 with 20 seconds left in the fourth quarter, forcing the OT.
Jayson Tatum and Marcus Morris scored 23 apiece for Boston and Terry Rozier had 10 points.
Joel Embiid led Philadelphia with 34 points, making 12 of 12 free throws, and pulled down 16 rebounds. Jimmy Butler scored 24, JJ Redick had 17 points and Ben Simmons added 11 points, 14 rebounds and eight assists for the Sixers.
The Los Angeles Lakers lost LeBron James in the third quarter to a strained left groin then went out and beat the two-time defending champions without him Tuesday night, getting King James' 17 points, 13 rebounds and five assists before the injury in a surprising 127-101 rout of the Golden State Warriors.
Stephen Curry made consecutive 3s shortly after James exited, and the Warriors got within 78-76 at the 2:48 mark of the third - but Kyle Kuzma and the persistent Lakers stayed at it every possession.
Curry wound up with 15 points but the home fans had seen enough well before the final buzzer and headed out for the rest of Christmas.
Kuzma contributed 19 points with a pretty baseline 3 late, Ivica Zubac had 18 points and 11 rebounds and Rajon Rondo 15 points and 10 assists off the bench.
Kevin Durant, playing on a tender left ankle, had 21 points, seven rebounds and seven assists. Andre Iguodala came off the bench and made his initial five shots and 7 of 9 by halftime on the way to a season-high 23 points while also handling some of the load defending James.