The Miami Heat had to come from behind inside the final five minutes to take a win over the Memphis Grizzlies.
The two-time defending champions were seven points behind with just over four minutes still to play in the fourth quarter, but Ray Allen and Dwyane Wade made a series of shots to add 11 unanswered points for the hosts.
The Oklahoma City Thunder needed two overtimes to clinch victory over the Toronto Raptors by a single point at the Air Canada Centre.
Kevin Durant added 51 for the Thunder, who sealed their fourth win in a row, but the visitors were unable to pull away from the Raptors, who had four players score more than 20.
DeMar DeRozan had a chance to win it in the fourth quarter for the hosts, but his shot came up short, before Durant gave the Thunder the lead with less than two seconds to play in the second overtime.
The Indiana Pacers sealed their fifth win in their last six games as they comfortably beat the Chicago Bulls.
Luis Scola led the team with 19 off the bench, inspiring a 19-0 run in the third quarter to leave the Eastern Conference leaders in control.
The San Antonio Spurs thrashed the Sacramento Kings to extend their winning run to 12 games and maintain their 1.5-game lead over the Oklahoma City Thunder in the Western Conference.
The Spurs split the workload, with Marco Belinelli adding 13 of his 17 inside the fourth quarter, while Kawhi Leonard finished with 15.
The Washington Wizards eased to a win in a heated game against the Los Angeles Lakers at the Staples Center.
John Wall added 28 points to lead to team to the win, but Drew Gooden and Jordan Hill were ejected with just over two minutes remaining following a fight over a loose ball.
The Philadelphia 76ers narrowly missed out on a chance to end their losing streak, suffering a one-point defeat to the New York Knicks.
James Anderson had a chance to set Thaddeus Young up to level the scores in the final moments of the game, but he fumbled the pass and the ball went out of bounds, condemning the Sixers to their 23rd straight defeat, while the Knicks are unbeaten in eight.
The Brooklyn Nets made it three wins in a row as they eased to victory against the Brooklyn Nets.
Joe Johnson scored 27 as the home side opened up 10-point lead by half time, before pulling ahead further in the third quarter.
The Dallas Mavericks thrashed the Denver Nuggets to boost their chances of sneaking into the playoffs.
Monta Ellis led the side with 26, including 14 in the fourth quarter to end any chances of a Nuggets comeback, while Dirk Nowitzki also contributed with 21.
A fourth-quarter run from Eric Bledsoe helped the Phoenix Suns claim a win over the Detroit Pistons.
The point guard scored 15 of his 23 points in the final period, after Goran Dragic and Markieff Morris had got the side off to a strong start.
The New Orleans Pelicans needed a big finish to beat the Atlanta Hawks, coming from behind in the fourth quarter.
Anthony Davis, who was struggling with a respiratory infection, scored 13 of his 34 in the final 12 minutes to secure a win for the visitors.
Results in full: Chicago Bulls 79-91 Indiana Pacers, New York Knicks 93-92 Philadelphia 76ers, Oklahoma City Thunder 119-118 Toronto Raptors, New Orleans Pelicans 111-105 Atlanta Hawks, Boston Celtics 98-114 Brooklyn Nets, Memphis Grizzlies 86-91 Miami Heat, Denver Nuggets 106-122 Dallas Mavericks, Detroit Pistons 92-98 Phoenix Suns, San Antonio Spurs 99-79 Sacramento Kings, Washington Wizards 117-107 Los Angeles Lakers
Sian Cowper
