The Cleveland Cavaliers pulled off an unlikely 118-114 home comeback win in overtime on Monday, but not without some help from the visiting Boston Celtics.

Boston, who led 92-78 at three-quarter time, and 102-91 with 4:30 remaining, gave up a 16-4 from that point to allow the Cavaliers to hit the lead with 24 seconds on the clock.

A Derrick White three-pointer put the Celtics back in front by two, before Donovan Mitchell tied things up at 109-109, but the visitors looked poised to get away with their sloppy fourth quarter after Grant Williams was sent to the free throw line with 0.8 seconds left.

After appearing to tell Mitchell "I'll make them both", Williams proceeded to miss both attempts, blowing a golden opportunity and sending the game to overtime.

The Celtics only mustered five points in the extra five minutes, clearly feeling the absence of missing star Jayson Tatum down the stretch, while Mitchell put the finishing touches on his 40-point night.

Cleveland's top scoring option finished 14-of-34 from the field, adding 11 rebounds and four assists, while rising second-year defensive ace Evan Mobley impressed with 25 points (10-of-14 shooting), 17 rebounds and three blocks.

Jaylen Brown did his best to cover for Tatum, finishing with team-highs in points (32), rebounds (13) and assists (nine), and Malcolm Brogdon was strong off the bench with 24 points (eight-of-14 shooting) and five assists.

Boston (45-21) are now two games behind the Milwaukee Bucks in the hunt for the Eastern Conference's top seed, while the Cavaliers (41-26) are also trending towards having home court advantage in the first round, sitting fourth.

Dame carries the Blazers

Damian Lillard produced his second triple-double of the season, and the third of his career, to lift his Portland Trail Blazers to a 110-104 victory on the road against the Detroit Pistons.

The current third-highest scorer in the league at 32.5 points per game, Lillard showed off his all-round skill set as he snatched down 13 rebounds to go with 12 assists and 31 points, shooting 10-of-28 from the field and six-of-14 from deep.

It was also an eye-opening performance from Cam Reddish. The Portland trade deadline acquisition had never registered more than six assists in a game before, but he flashed some impressive playmaking with eight assists, 13 points, six rebounds and two steals in 40 minutes.

The result leaves the Trail Blazers tied with the 10th-seeded Utah Jazz at 31-34 as they try to force their way into the Play-In Tournament.

Harden and Haliburton combine for 36 assists in shootout

In a clash between the league's top two assist leaders, James Harden's Philadelphia 76ers overcame Tyrese Haliburton's Indiana Pacers in a 147-143 shootout.

Harden finished with 14 points (three-of-11), 20 assists, nine rebounds, and just one turnover, becoming the first player in 76ers history to record multiple 20-assist games in one season. 

Meanwhile, Haliburton exploded for one of the best games of his career with 40 points (12-of-19), 16 assists and two turnovers.

Joel Embiid carried the scoring load for Philadelphia, leading the way with 42 points (11-of-16 shooting, 19-of-19 free throws) while also forcing elite defender Myles Turner to foul out in just 17 minutes.