OAKLAND, Calif. — The NBA record for best start by a defending champion is 14-0, set by the Boston Celtics in 1957.

The Golden State Warriors are 11-0 and, if they can get through this week, can break the record Sunday in Denver.

But getting through the week will not be easy, because this is the week:

• Tonight at home against Toronto (7-4).

• Thursday night in Los Angeles against the Clippers, who are 5-1 at home and always bring their angry best for the Warriors.

• Friday night at home, the back end of a back-to-back, with travel, against the Chicago Bulls, one of only two teams to win at Oracle Arena in the regular season last year.

On the plus side, the Warriors will be focused after having narrowly escaped a loss Saturday night against the lowly Brooklyn Nets.

“We know we’re not invincible if we don’t come ready to play,” star guard Stephen Curry said after the 107-99 overtime victory. “I think we came ready to play (against Brooklyn), but if we don’t play our best and execute and bring effort on the defensive end, there are nights stuff like this could happen and it could not go our way down the stretch and we’ll end up with a loss.”

If the Warriors get to 15-0, they not only will break the record for best start by a defending champ, but they also will tie the NBA record for best start by any team. The 1948-49 Washington Capitols and the 1993-94 Houston Rockets both started 15-0.