Los Angeles (dpa) - Suddenly, the streaking Boston Celtics are slumping.

Stephen Jackson scored 15 of his game-high 28 points in the final quarter, and Italy's Marco Belinelli added 22 as the Golden State Warriors sent the visiting Celtics to back-to-back losses for the first time this season with a 99-89 victory on Friday night.

"We played hard and found a way to get it done against a great team," said Jackson, who had missed the last four games with a sprained right hand.

"We just fought the whole way and it shows when we play hard and stay together good things will happen."

The defending champion Celtics began their four-game West Coast trip with a 27-2 record - the best start in NBA history - while riding a franchise-record 19 consecutive victories.

But the LA Lakers ended that run on Christmas Day before being stunned by the struggling Warriors (9-22).

"We knew they lost to the Lakers," said Warriors forward Kelenna Azubuikie, who contributed 10 points off the bench. "We just wanted to get them while they were hopefully down."

Paul Pierce scored 21 points, while Rajon Rondo had 11 points, 10 rebounds and nine assists for the Celtics (27-4) who were outscored 35-17 in the final frame.

"I can't say we played bad," said Celtics Ray Allen, who finished with just seven points. "But the games we lost, there has been a point in the fourth quarter where we couldn't get shots."

The Warriors trailed 72-64 entering the fourth quarter. However, Jackson made three free throws after drawing a foul from Allen to cap a 25-6 surge and put the hosts ahead, 87-78 with 4:23 remaining.

The Celtics pulled within 89-84 after Pierce made one-of-two free throws with 2:11 left.

However, CJ Watson buried back-to-back jumpers, Jackson sank both free throws, and Rony Turiaf (14 points) hit four more to seal the improbable win.

Elsewhere:

Utah Jazz 97, Dallas Mavericks 88

Ronnie Brewer had 21 points, and rookie Kosta Koufos added a career-high, 18 as the short-handed Jazz dropped the visiting Mavericks.

Utah (18-13) stopped a two-game slide and ended Dallas' three-game success without injured stars Carlos Boozer, Paul Millsap and Mehmet Okur.

Jason Tery led the Mavericks (17-12) with 26 points. German wunderkind Dirk Nowitzki had 17 with eight rebounds before being ejected early in the final quarter after committing a flagrant foul on Matt Harpring.

Denver Nuggets 105, Philadelphia 76ers 101

JR Smith hit seven three-pointers en route to 27 points, and Kenyon Martin made the go-ahead dunk with nine seconds left, as the Nuggets overcame a 17-point third-quarter deficit to slip past the visiting 76ers.

Andre Iguodala had 24 points for Philadelphia (12-17) which dropped its third in a row.

New Orleans Hornets 88, Houston Rockets 79

Chris Paul had 26 points with 10 assists, David West scored 23 and the Hornets held the Rockets without a field goal for nearly the final nine minutes to snap a two-game slide.

China's Yao Ming led Houston (19-11) with 19 points and 12 rebounds.

Detroit Pistons 90, Oklahoma City Thunder 88

Allen Iverson scored 22 points, including the game-winning runner with three-tenths of a second left, and the host Pistons escaped the upset-minded Thunder.

Kevin Durant topped league-worst Oklahoma City (3-27) with 26 points.

Miami Heat 90, Chicago Bulls 77

Dwyane Wade scored 28 points, Daequan Cook drained three timely three-pointers in the final quarter, and the Heat's 16th victory eclipsed its entire total of last season.

Charlotte Bobcats 95, New Jersey Nets 87

Raymond Felton scored 22 points, Emeka Okafor added 21, leading the Bobcats to their fourth win in the last five games.

Vince Carter had 19 points for the Nets (14-15), who dropped to 5- 11 at home.

Memphis Grizzlies 108, Indiana Pacers 105

Hakim Warrick had 21 points, OJ Mayo added 18, including two free throws with a second left, and the Grizzlies rallied from 17 to snap a four-game slide.

Danny Granger paced Indiana (10-19) with 26 points.

Minnesota Timberwolves 120, New York Knicks 107

Rashand McCants hit seven three-pointers en route to a season-high 23 points, while Al Jefferson had 21 and 15 rebounds, as the lowly Timberwolves snapped a 13-game losing streak.

Minnesota (5-23) earned its first win since beating Oklahoma City on November 28, allowing Kevin McHale to post his first coaching victory in nine attempts after firing Randy Wittman on December 8.

Al Harrington and Nate Robinson had 26 points apiece for the struggling host Knicks (11-17) who lost their fifth in a row.

Toronto Raptors 107, Sacramento Kings 101

Jermaine O'Neal had a season-high 36 points, helping the Raptors (12-17) stop a 10-game losing streak at Arco Arena.

John Salmons and Brad Miller had 20 points apiece for the Kings (7-23) who have lost five in a row.