The NBA-leading Milwaukee Bucks were too good for the Portland Trail Blazers 122-101, while the depleted Los Angeles Lakers extended their winning streak.
Giannis Antetokounmpo led the way with 32 points and 17 rebounds as the Bucks won their third consecutive game and improved to 35-6 for the season.
Khris Middleton posted 30 points and team-mate Eric Bledsoe contributed 29 for the high-flying Bucks in Portland on Saturday.
The Lakers celebrated their eighth successive victory by topping the Oklahoma City Thunder 125-110 without a host of stars on the road.
LeBron James, Anthony Davis and Danny Green were all absent for the trip to Oklahoma City, but Western Conference leaders the Lakers still won thanks to a season-high 36 points from Kyle Kuzma.
Career night for Tatum
A career-high 41 points from Jayson Tatum led the Boston Celtics past the New Orleans Pelicans 140-105, snapping a three-game skid in the process.
James Harden passed 20,000 career points in the Houston Rockets' 139-109 victory against the Minnesota Timberwolves. He scored 32 points, 12 rebounds and eight assists in three quarters.
Triple-doubles from Tristan Thompson (18 points, 13 rebounds), Kevin Love (19 points, 15 rebounds) and Cedi Osman (11 points, 12 rebounds) helped the Cleveland Cavaliers shock the Denver Nuggets 111-103.
Shooting struggles for Sixers
The Philadelphia 76ers had plenty of looks but were woeful from the floor in their 109-91 loss away to the Dallas Mavericks. Philadelphia tallied 98 shots but finished at 38 per cent. The 76ers were also nine of 37 from three-point range.
The Celtics were red-hot in this team move that stunned the Pelicans and set up Enes Kanter.
Houston Rockets 139-109 Minnesota Timberwolves
Boston Celtics 140-105 Orleans Pelicans
Chicago Bulls 108-99 Detroit Pistons
Los Angeles Lakers 125-110 Oklahoma City Thunder
Dallas Mavericks 109-91 Philadelphia 76ers
Cleveland Cavaliers 111-103 Denver Nuggets
Milwaukee Bucks 122-101 Portland Trail Blazers
Clippers at Nuggets
The Los Angeles Clippers (27-12) – riding a two-game winning streak – can cement second spot in the west on Sunday. The Nuggets (26-12) will host the Clippers after being shocked by the Cavs.