Giannis Antetokounmpo of the Milwaukee Bucks shoots the ball against the Brooklyn Nets on Tuesday in Milwaukee, Wisconsin. Photo: VCG

Giannis Antetokounmpo scored 32 points as the Milwaukee Bucks launched the defense of their NBA crown on Tuesday with a 127-104 victory over the Brooklyn Nets, as ­LeBron James and the Los ­Angeles Lakers were outgunned by the Golden State Warriors.

Antetokounmpo picked up where he left off in guiding the Bucks to victory in the NBA ­Finals last season, leading an emphatic all-round offensive display that included 14 rebounds and seven assists.

The two-time NBA Most Valuable Player was one of five Bucks who cracked double figures on a night when Milwaukee's fans celebrated as the team raised its first championship banner in 50 years at the Fiserv Forum.

Khris Middleton had 20 points while Pat Connaughton also made 20 off the bench. Jordan Nwora added 15 points while Jrue Holiday, who left the game with an injury early on, had 12 points.

Antetokounmpo was pleased with the way the Bucks turned their attention to the challenge of the Nets after the pre-game festivities.

"It was hard - we all were excited to get the rings, and seeing our banner," Antetokounmpo said. 

"It's kind of hard to balance that, to go from that excitement and emotional state to go and play a game.

"But I think we did a great job. We were able to focus on our gameplan and ourselves and get a win."

It was a chastening loss for Brooklyn, who have started the season without the services of Kyrie Irving.

The Nets have left Irving out of the lineup for the foreseeable future because of his refusal to take the COVID-19 vaccine, which makes him ineligible for home games in New York due to city laws.

In Irving's absence, Kevin Durant led the Brooklyn scorers with 32 points while James Harden had 20. New signing Patty Mills added 21 - making seven-from-seven from three-point range - while Nic Claxton had 12 points.

In Tuesday's other season-­opener, the new-look Los ­Angeles Lakers suffered a humbling 121-114 loss to the Warriors at the Staples Center.

James led the Lakers scorers with 34 points while Anthony Davis chimed in with 33. 

But the Lakers stars were the only two Los Angeles players to make double figures, while blockbuster new signing Russell Westbrook was restricted to eight points, five rebounds and four assists.

Instead it was the Warriors who looked the more cohesive unit, with Stephen Curry leading the way with 21 points, 10 rebounds and 10 assists - Curry's first triple-double since 2016.