Steve Nash said Knicks coach Mike D’Antoni has faced nothing but upheaval during his tenure.

“He’s in a tough position,’’ Nash said after his brilliant 26-point, 11-assist performance Wednesday night, capped by hitting six straight free throws in the final 16 seconds. “Things have constantly changed. Now he has all these new pieces, he doesn’t have the point guard he wanted. Maybe Baron [Davis] can help but to me, it’s been a constant transition, constant waiting game.

“Waiting for the Melo trade to happen, waiting for Tyson [Chandler] to guard the interior, now waiting for Baron to get healthy. That’s tough not to have that balance of the roster.”