Mavs, Celtics advance as Bucks, Suns exit NBA playoffs

Luka Doncic led a stunning Dallas Mavericks rout of the top-seeded Phoenix Suns while the Boston Celtics eliminated the defending champion Milwaukee Bucks on a day of NBA playoff upsets on Sunday.

In Phoenix, Slovenian superstar Doncic led a total eclipse of the Suns as Dallas clinched a 4-3 series victory with an extraordinary 123-90 thrashing of the Western Conference favourites.

The Suns had entered the playoffs boasting the best record in basketball after a 64-win regular season and were tipped by many to return to the NBA Finals for a second straight season.

But the Suns' dreams of a championship were incinerated by a red-hot shooting performance from Doncic and the Mavs, who will now advance to a Western Conference finals showdown with the Golden State Warriors starting on Wednesday.

Doncic finished with 35 points, 10 rebounds and four assists while team-mate Spencer Dinwiddie provided scoring support with 30 points, including five three-pointers.

Jalen Brunson also posted double figures while Phoenix were left pondering a no-show by their two stars Devin Booker (11 points) and Chris Paul (10).

The Mavericks led from start to finish and at one stage in the second half had sprinted into a 46-point lead.

Their 57-27 half-time lead was the biggest ever in a decisive game seven in the NBA playoffs.

"Amazing," Doncic said. "I don't know what to say but this was amazing to win.

"Everybody played as hard as they can. We didn't have any days off. An incredible team win. I don't have nothing more to say."

Phoenix coach Monty Williams said his team had saved their worst performance of the season for their most important game.

"I just told them how badly I hurt for them," Williams told reporters shortly after addressing his team.

"I know