James Harden said the Brooklyn Nets took "a huge step" by shaking off sketchy offensive form to overcome the Boston Celtics in Game 1 of their playoff series.

Brookyln's big three scraped together sufficient points to make it comfortable enough in the end, the home team grabbing a 104-93 win, having trailed 53-47 at halftime.

Kevin Durant had 32 points and 12 rebounds, Kyrie Irving added 29 points and Harden weighed in with 21 as the Nets proved too strong for a Celtics side who had 22 points on six-of-20 shooting from Jayson Tatum.

Harden said: "We just engaged. Everybody that steps on the floor is engaged and pretty much knows what they have to do. So everybody had each other's back.

"No matter what happens offensively, defensively is where we show some improvement and tonight was a huge step for us."

With fans back in Barclays Center, Harden suggested their presence may have been a slight distraction, as might the pressure of starting a playoffs tilt.

But ultimately he settled on it being the players' failure to convert opportunities as the reason the Nets took so long to get going.

"We just didn't make shots. I'm sure if we made shots it would be a different conversation," he said.

Asked about Tatum, Harden said: "He's going to be better in Game 2 and we will too."

Durant reached a similar conclusion to Harden.

"We couldn't make shots, I felt like," Durant said. "When we tried to bust the game open seven or eight points, we got open threes we didn't make. We got our scorers in position, but I know I missed a lot of bunnies that felt good leaving my hand.

"But we stuck with our defense. We didn't let that get in the way of what we wanted to do out there. We helped each other and boxed out well. We've got to keep that same effort going into Game 2."

From 82-79 up, the Nets went on a scoring surge and pulled 99-82 ahead in the fourth quarter, before easing to victory.

Irving, prominent in that dominant run, said: "I just think we needed a little separation, just to settle in for the rest of the game. Fourth quarter, we've had the tendency of taking our foot off the gas pedal, of stopping attacking the rim or settling for jump shots or just not swinging the ball around and making easy plays for one another.

"Obviously we know we have all-world one-on-one players, but we make it a little easy when teams can just load up and our one-on-one game isn't working. You can see anything can happen at the end of the game. Kemba [Walker] hits two big threes, we get a flagrant foul. Anything can happen, especially against the Celtics.

"That lucky Irishman is always around the Celtics, so we've just got to be aware of anything against the Celtics. And I think we did a good job of kind of withstanding their runs down the stretch."