Brooklyn Nets coach Steve Nash concedes James Harden's hamstring issue which forced him out of Monday's 114-112 win over the New York Knicks may linger.

Harden only played four minutes for the Nets before being benched in his first game back after missing the previous two with right hamstring tightness.

The latest issue was to the same hamstring, with Nash clarifying that they could not yet identify the problem.

"Very similar to last time. He's got an awareness that something isn't right in his hammy," Nash said post-game.

"His scan was clean as we reported. His strength tests when he came back in the locker room were normal.

"It's something where we have to protect him. We have to trust him. It's very frustrating for James.

"We can't risk it if we can afford not to. That depends on trust between us and James and making sure he feels comfortable in the decision. I thought tonight the right decision was to not take any risk with him.

"Who knows? This may linger. It may be all behind us like we thought it was before the game.

"It's one of those things where the scan is clean, his strength tests are clean but he feels something so we're going to err on the side of caution."

Nash added that Harden underwent further strength tests in the locker room during Monday's game.

"When he went back, they tested his strength," he said. "The report was that they couldn’t declare there was anything.

"He's feeling something. We believe him. It's frustrating. We don't have any indicator that this is a long-term thing or he's done any damage.

"We just have to proceed day by day and monitor it and hopefully it's a very short-term thing."

Kyrie Irving stepped up with 40 points and seven assists, while Jeff Green had 23 in Harden's absence as the Nets improved to 35-16.