Defending champions the Milwaukee Bucks were eliminated from the NBA play-offs after a heavy defeat by the Boston Celtics in their Eastern Conference semi-final decider.

The Celtics won game seven 109-81 at home and will now face the Miami Heat in the Eastern Conference finals.

Grant Williams hit 27 points, including seven three-pointers, for Boston, while Jayson Tatum added 23.

Giannis Antetokounmpo top scored for the Bucks with 25 points.

The two-time former MVP started strongly as the Bucks led 26-20 after the first quarter, but then cooled off as the Celtics streaked away.

Boston converted 22 of their 55 three-point attempts, while Milwaukee made only four of their 33 efforts from deep.

The Celtics, who have won a joint-record 17 NBA titles along with the Los Angeles Lakers, move on to their fourth conference finals appearance in the last six years, seeking their first title since 2008.