The Atlanta Hawks replaced the Golden State Warriors as the team with the best record in the NBA as they won the clash between the two conference leaders.
The sides were tied at half time, but the Eastern Conference leaders used their depth to pull ahead, with Jeff Teague leading seven Atlanta players in double figures.
Kawhi Leonard led the scoring for the current league champions, adding 24 to ensure that the Heat never recovered from San Antonio's quick start.
Kyrie Irving tried to set up a 13th straight victory for Cleveland, but the Australian fouled George Hill late on after CJ Miles had made the scores close, allowing Hill to edge the Pacers ahead with a free throw.
The Clippers were 15 points up at the end of the first quarter, but DeMar DeRozan led the comeback, scoring 24 points to put Toronto ahead in the second half.
Twelve of Harden's points came from the free point line as the Rockets led for much of the game, while holding off a late comeback from the Bucks, led by Giannis Antetokoumpo.
Russell Westbrook scored 48 to keep the sides level heading towards the final buzzer, but Davis made a three-pointer in the final second to lift the Pelicans to the win.
Morris ensured that the Suns pulled away before half time, scoring 24 before the break, snapping Phoenix's three-game losing streak.
The home side were ahead by 22 during the third quarter as Greg Monroe scored 21 points and made a career-high 21 rebounds before the Nuggets pulled some consolation points back in the fourth.
Ricky Rubio scored eight points inside the final two minutes after shaking off an ankle injury, overturning a seven-point deficit for the Wolves.
Results in full: New York Knicks 88-92 Brooklyn Nets, Cleveland Cavaliers 99-103 Indiana Pacers, Los Angeles Lakers 97-103 Orlando Magic, Los Angeles Clippers 107-123 Toronto Raptors, Golden State Warriors 116-124 Atlanta Hawks, Philadelphia 76ers 96-107 Boston Celtics, Denver 88-98 Detroit Pistons, Milwaukee Bucks 111-117 Houston Rockets, Memhphis Grizzlies 89-90 Minnesota Timberwolves, New Orleans Pelicans 116-113 Oklahoma City Thunder, Utah Jazz 93-100 Phoenix Suns, Miami Heat 85-98 San Antonio Spurs