NBA Round up - Siakam and Raptors upset Celtics

Pascal Siakam poured in 40 points as the Toronto Raptors snapped the Boston Celtics' six-game win streak with a 115-112 overtime victory on Monday.

Siakam and the Raptors took advantage of a depleted Celtics line-up to grab a crucial victory that boosts Toronto's hopes of securing an automatic postseason berth.

The win moves Toronto level with the Chicago Bulls on 43 wins and 32 losses in the East, just ahead of the Cleveland Cavaliers who are one place outside the automatic playoff spots in seventh.

The Celtics have been the form team in the NBA recently, motoring to 11 wins in their last 12 games prior to Monday's clash.

But Boston were jolted earlier Monday by confirmation that center Robert Williams III faces a lengthy layoff with a knee injury, while Jaylen Brown and Jayson Tatum were also sidelined with knocks.

That cleared the way for Siakam to take over at Toronto's ScotiaBank Arena with a 40-point display as well as 13 rebounds, three steals and two blocks.

Fred VanVleet and O.G. Anunoby added 14 points each while Thaddeus Young and Gary Trent Jr had 12 points apiece.

"It was a great team win," said Siakam, who was sidelined for several months last year after undergoing shoulder surgery.

"It's been a long road, so I'm excited about just getting back to the grind and working hard, just playing with everything I’ve got.

"We're a team. We have a next man up mentality, just go out there and win the game."

Marcus Smart led the Celtics scorers with 28 points, while Grant Williams finished with 17.

Boston's loss means Miami reclaimed top spot in the Eastern Conference with a 123-100 victory over the Sacramento Kings in Florida.

- Eye on playoffs - Jimmy Butler finished with 27 points and seven assists while Bam Adebayo added 22