Al Horford says the Boston Celtics are "not where we need to be yet" despite beating the New York Knicks to claim an eighth-straight win.

The Celtics won 116-102 on Saturday to mark a season-best winning streak, while they are also eight games clear at the top of the Eastern Conference.

Jaylen Brown finished with 30 points, Kristaps Porzingis had 22 and Jayson Tatum had 19, while Horford chipped in with 10 points from the bench, as Boston sealed their fourth win of the season over the Knicks.

But in spite of their fine form, Horford says the Celtics must demand more from themselves.

"It's just the way kind of the season has gone," he said.

"We've kind of held our own, continued to work through things. Obviously, the [Philadelphia 76ers] have injuries, different teams have different stuff going on, so that all goes into account.

"But I can just speak to we're continuing to play good basketball. We're really trying to play the right way. I feel like [Celtics coach Joe Mazzulla] is really challenging us to continue to get better. This is the stretch of the season where we can really take it to another level, and that's what we're trying to do.

"I feel like we're not where we need to be yet, and that's a good thing."

Mazzulla added: "The guys understand how to positively impact each other.

"They understand how going into something at one point in the game is going to open it up for someone else later in the game. And we have different combinations, and the guys trust those combinations, and it puts us in a better position to win.

"At the end of the day, it's about winning, and the guys are understanding that. They understand how they affect each other."

Brown, however, pointed to the postseason as when the level of performance will truly count for the Celtics.

He said: "When it comes down to the playoffs, none of that stuff really matters.

"I feel like it's going to be about matchups, it's going to be about playing hard. Obviously, home court matters, so that is key, but when you get into the thick of it, you;'ve got to win basketball games. Regardless of what your seed is.

"If anything, it puts more pressure on you. But I think we're an experienced team. We've been in these situations before and I think we're ready."