Celtics' Grant Williams had a great night when his team defeated the reigning NBA champions Milwuakee Bucks in the decisive seventh game.

Williams accounted for the career-best 27 points, of which seven were three points.

Star Jayson Taum added 23 points himself when Boston broke a "Match seven" record, the team had a total of 22 three-pointers.

Williams first missed five of seven three-pointers, but a "pep talk" and an open three-pointer later were different.

- For me, it was about the opponents encouraging me (to take three points), so I can just as easily take advantage of it.

I just got more and more comfortable, he tells AP.

Milwaukee's superstar Giannis Antetokounmpo made a strong effort with his 25 points, 20 rebounds and nine assists.

But it did not help in the end.

Loss of 109-81 means vacation awaits for Milwaukee.

The Boston Celtics are now in the final of the Eastern Conference, where the Miami Heat await.

In the Western Conference, the Golden State Warriors and Dallas Mavericks meet.