Utah Jazz guard Mike Conley (center) drives between Milwaukee Bucks' Giannis Antetokounmpo (left) and George Hill on Sunday in Milwaukee, Wisconsin. Photo: VCG

Mike Conley scored 20 points in his return to the lineup and Donovan Mitchell scored 28 points as the Utaz Jazz beat the reigning NBA champions Milwaukee Bucks 107-95 on Sunday.

Mitchell scored 11 of his points in the fourth quarter as the Jazz never trailed.

"We really executed when we needed to," said Mitchell. "They're NBA champions. They're not going to just go down 15 and call it a day."

Giannis Antetokounmpo finished with 25 points, seven rebounds and six assists for the Bucks, who trailed at one stage by 17 points but rallied to cut the Jazz's lead to just four points in the final quarter.

Former Jazz player Grayson Allen finished with 18 points for the Bucks, who lost at home for the third time in a three-game homestand. Milwaukee also slipped below 0.500 at 3-4 with a third straight loss.

The Jazz took a 99-87 lead with just over three minutes left in the fourth thanks to Mitchell's seven points in two minutes of action.

But the Bucks clawed their way back as Allen made two three-pointers and Thanasis Antetokounmpo made a dunk to cut the Jazz lead to 99-95 with 99 seconds left.

Mitchell stretched the Jazz's lead to six with a basket, and Royce O'Neale made a clutch defensive play by blocking an Allen three-point attempt to extinguish the Bucks' comeback bid. 

The victory was the fifth in six games for Utah, which suffered its first loss of the season in Chicago on Saturday.

"You look at tonight and you look at the way last night went, two polar opposite situations," Mitchell said. "I think there were times Chicago really amped up the pressure and we weren't ready for it. [The Bucks] did it again tonight and we were ready for it."

Elsewhere, Kevin Durant scored 23 points before being ejected in the third quarter of the Brooklyn Nets' 117-91 win over the Detroit Pistons.

Durant was thrown out of the game for a flagrant foul with 3:23 remaining in the third quarter. Officials sent him to the showers after he hit Kelly Olynyk in the face with his right arm. Durant shot 10-of-13 from the field before getting ejected.

James Harden produced his 59th career triple-double with 18 points, 12 assists and 10 rebounds as the Nets led by as many as 30 at one stage.

Durant's ejection comes one day after he was fined $25,000 by the league for tossing a ball into stands during Friday's game against Indiana.

In Dallas, Luka Doncic capped a team-high 23-point night with a clutch three-pointer as the Dallas Mavericks beat the Sacramento Kings 105-99. 

Doncic also dished out 10 assists and eight rebounds for the Mavericks, who shot 44.4 percent from the field after having been held to 29.5 percent in a Friday loss to Denver.

Richaun Holmes posted a 22-point, 13-rebound double-double for the Kings, who had a two-game win streak snapped.