Josh Giddey has bounced back to form, contributing 20 points, 12 rebounds and seven assists as Oklahoma City beat San Antonio to keep up the pressure at the top of the NBA's Western Conference.

Giddey has enjoyed a productive few weeks with the Thunder, capped on Monday by his 11th NBA triple-double.

But he had a much quieter time on Tuesday as OKC beat Charlotte, scoring just four points and making three assists.

Wednesday's clash with the Spurs provided a third straight victory for the Thunder, for whom the electric Shai Gilgeous-Alexander scored 26 points in 26 minutes as the hosts improved their season record to 55-25, winning 127-89.

The Spurs were without rising star Victor Wembanyama, rested with an ankle injury.

In Cleveland, Donovan Mitchell scored 29 points and Jarrett Allen added 16 as the Cavaliers beat Memphis 110-98 to move within one victory of wrapping up a play-off spot: they face Indiana and Charlotte at home in their next two games.

Jake LaRavia scored a career-high 32 and made eight 3-pointers for injury-plagued Memphis, who have used an NBA-record 33 players this season.

The Atlanta Hawks, 10th in the Eastern Conference, lost 115-114 to the Hornets to miss the chance to move within a half-game of Chicago in the race for a home fixture to open the play-in tournament.

Dallas wrapped up the Southwest Division title by beating Patty Mills's Miami 111-92.

Luka Doncic scored 29 points and Kyrie Irving added 25 for the Mavericks, who will face the Los Angeles Clippers in the first round of the Western Conference play-offs.

Milwaukee (49-31) beat Orlando 117-99 to move 1.5 games ahead of New York (47-32) and two ahead of Cleveland (47-33) in the race for the Eastern Conference's No.2 play-off seed behind the Boston Celtics.

Bobby Portis had 30 points, nine rebounds and a career-high five steals to help the Bucks make light of the absence of Giannis Antetokounmpo.

Antetokounmpo left Milwaukee's 104-91 victory over Boston on Tuesday with a strained left calf and will miss the final three games of the regular season.

His availability for the start of the play-offs remains uncertain.

In Denver, the defending champion Nuggets (56-24) took a one-game lead over Minnesota and Oklahoma City, who are both 55-25.

Nikola Jokic scored 41 points and powered the Nuggets past the Timberwolves 116-107, and into sole possession of first place in the tight Western Conference play-off race.

Jokic made 16 of 20 shots against the NBA's best defence while being guarded most of the night by the league's top defender, Rudy Gobert.

The Phoenix Suns are seventh in the West after a 124-108 win over the Clippers, a half-game behind New Orleans for the sixth and final guaranteed play-off spot.

Devin Booker scored 37 points and Bradley Beal added 26 as Phoenix rallied in the fourth quarter to beat the Clippers.

The result locked Golden State and Los Angeles Lakers into the play-in tournament.

The Brooklyn Nets beat the Toronto Raptors 106-102.