The Miami Heat were well beaten by the Washington Wizards as they slipped to their third defeat in a row.
The defending champions were 25 points down at the end of the first quarter, and the Wizards continued to increase their lead to 34.
The Chicago Bulls eventually clinched a narrow win over the Orlando Magic after three overtimes.
Joakim Noah scored a season-high 26 points to help the visitors come back from seven points down at the start of the fourth quarter.
Glen Davis could have given Magic the win inside the last 10 seconds, but his jump shot was blocked and rebounded to seal the Bulls' victory.
The visitors were down by seven points at the start of the final period, but they fought back before James Harden added the game-winning jump shot with 28 seconds to spare.
Gerald Green upped his game in the second half, finishing with a season-high 28 points, while both teams had a player ejected in the second quarter.
The two-time All-Star led a 12-0 run for the hosts inside the final 12 minutes of the meeting, helping them secure the 108-96 victory.
Nate Robinson scored 14 of his 24 points in the fourth quarter, ensuring that the visitors held on for the victory.
Tony Parker led the team with 25 points, giving them a big enough lead to hold on against a late Jazz rally.
A last-gasp three-pointer allowed the Philadelphia 76ers to seal victory over the Charlotte Bobcats.
Thaddeus Young made the shot with just over three seconds left to play, giving the home side enough to clinch the win.
The visitors split the workload, with Mike Conley, James Johnson and Ed Davis all among the points, as they opened up a lead in the fourth quarter, despite having been two points down heading into the final spell.
Results in full: Chicago Bulls 128-125 Orlando Magic, Charlotte Bobcats 92-95 Philadelphia 76ers, Miami Heat 97-114 Washington Wizards, Toronto Raptors 83-88 Boston Celtics, Memphis Grizzlies 82-77 Milwaukee Bucks, Sacramento Kings 111-108 Minnesota Timberwolves, Houston Rockets 103-100 New Orleans Pelicans, Utah Jazz 105-109 San Antonio Spurs, Los Angeles Lakers 114-121 Phoenix Suns, Cleveland Cavaliers 96-108 Portland Trail Blazers, Denver Nuggets 123-116 Golden State Warriors, Dallas Mavericks 127-129 Los Angeles Clippers