In the first game of the NBA finals, the Boston Celtics hit nine three-pointers in the final quarter to beat the Golden State Warriors 120-108.
Stephen Curry had a game-high 34 points for the Warriors, who had not lost at home in the play-offs.
Jaylen Brown scored 10 points in the last quarter to lead the Celtics to a victory.
The second game of the series is on Sunday in San Francisco.
After five failed runs in the play-offs over the past 12 years, Boston returned to the Finals.
Warriors coach Steve Kerr gave them credit.
They played a great fourth quarter. As simple as that, it is. They were the ones who deserved their victory.
Al Horford said he had been waiting for this moment for a long time.
He said he wanted his team-mates to relax and not feel the pressure of the occasion.
He wanted to make sure that the guys were free to play. I wanted them to know that this is just a game and that they should enjoy it.
A lot of the guys here have bought into what we are trying to do.