The New York Knicks climbed out of a 21-point hole to beat the Philadelphia 76ers 108-97 on Sunday night in the US as the Toronto Raptors authored another NBA comeback win and the depleted Denver Nuggets fell.

Evan Fournier scored nine of his 17 points in the fourth quarter for the Knicks as New York's reserves played a key role in the team's biggest comeback win of the season.

Julius Randle led the Knicks with 24 points and Jalen Brunson added 21, but with ailing RJ Barrett a late scratch the bench contributed 37 points and the Knicks bounced back from a crushing overtime loss to the Clippers on Saturday.

Sixer big man Joel Embiid was his usual dominant self, his 31 points including 18 from the free-throw line.

Philadelphia led by 21 in the first quarter, but the Knicks had cut that deficit to two points at halftime and after briefly taking the lead were down by three going into the fourth.

New York surged in the final period. Their 10-0 run capped by Fournier's three-pointer put them up by four and they wouldn't trail again.

It was an eye-catching performance for France's Fournier, who was bumped to the bench this season and has been at the center of trade speculation with the deadline looming next week.

Although the 76ers' second unit struggled, coach Doc Rivers said that wasn't the reason for the defeat.

"We were just not emotionally strong tonight — mentally," Rivers said. "I thought they were the mentally tougher team and they deserved to win."

The Raptors also staged an impressive comeback, erasing a 15-point third-quarter deficit to beat the Grizzlies 106-103 in Memphis.