Shai Gilgeous-Alexander has scored 40 points as Oklahoma City defeated visiting Denver 127-103 in a match-up between the top two teams in the Western Conference.

Gilgeous-Alexander had eight assists and made all eight of his free throws for the West-leading Thunder, who won their seventh straight game and improved to 53-11 on Sunday (Monday AEDT). Jalen Williams added 26 points, nine rebounds and eight assists.

The Nuggets' Nikola Jokic, who along with Gilgeous-Alexander is a top contender in the NBA's MVP race, had 24 points, 13 rebounds and nine assists. He was coming off the league's first 30-20-20 triple-double in his team's 149-141 overtime victory over Phoenix.

Michael Porter Jr had 24 points and 15 rebounds for Denver (41-23).

In Dallas, Devin Booker scored 24 points and Kevin Durant had 21 points, nine rebounds and eight assists as the Suns beat the injury-depleted Mavericks 125-116.

Bradley Beal scored 19 points and Grayson Allen added 17 as Phoenix pulled within a game and a half of Dallas for the 10th seed in the West, the final spot in the play-in tournament.

Naji Marshall had a career high for the second consecutive game with 34 points for the Mavs, who were down to seven healthy players by the end of the game.

Dallas big men Kessler Edwards and Dwight Powell went to the locker room after their heads collided chasing a loose ball late in the third quarter. Guard Brandon Williams was later ruled out with left hamstring tightness.

The Mavericks (32-33) matched their longest losing streak of the season at five games and dropped below .500 for the first time since mid-November.

In Milwaukee, Max Strus had 17 points to lead eight Cavaliers who scored at least nine as Cleveland won 112-100 against the Bucks.

It was the Cavaliers' 14th consecutive victory, one shy of their season-best streak that kicked off their campaign.

Donovan Mitchell scored 15 points, Evan Mobley and Darius Garland added 13 apiece and Jarrett Allen tallied 11. Strus also led the team with nine rebounds.

Giannis Antetokounmpo led the Bucks, who lost their second in a row, with 30 points and nine rebounds.

The NBA-best Cleveland (54-10) swept the four-game season series against the Bucks (36-27) for the first time since 2008-09.

In Inglewood, California, Kawhi Leonard's hook shot at the buzzer lifted the Los Angeles Clippers over the Sacramento Kings 111-110 in overtime to tighten their grip on eighth place in the West.

Leonard dribbled to the top of the key with 21.6 seconds remaining and let the clock tick down before making his winning move through defenders in the lane. The ball bounced on the rim before going in. He finished with 17 points.

James Harden had 29 points, nine rebounds and 11 assists for the Clippers (35-29), who won their third in a row.

DeMar DeRozan had 31 points and 10 assists, and Zach LaVine added 30 points for the ninth-place Kings (33-30).

In other results, there were wins for the Grizzlies over the Pelicans, the 76ers against the Jazz, the Timberwolves over the Spurs, and the Pistons beat the Trail Blazers.