NEW YORK — Down 3-1, the New York Knicks still have little chance of upsetting the Heat in the first round of the playoffs.

But their odds of rallying got a bit better thanks to LeBron James’s temper tantrum following Miami’s 89-87 loss in Game 4 Sunday.

James received medical treatment on his left hand, damaging it when he punched veteran teammate Juwan Howard’s metallic walking cane inside the Heat’s locker room following the game. James left Madison Square Garden with his hand bandaged and his arm in a sling.

Heat coach Erik Spoelstra offered little about the injury.

“I’m not going to comment until I see or hear what’s going on,” Spoelstra said. “Apparently, his hand is bruised. How severe I don’t know. I’m trying to learn a little bit more about it.

“We’re just going to see how severe it is when the doctors get done with it.

“I just know we need to get Juwan a new cane. I’m worried he won’t be able to get home.”

Dwyane Wade sounded as if James would be missing time.

“It’s tough,” he said. “You get emotional. You make a mistake, you see a walking cane, you punch it. And now you deal with the repercussions.

“You’d be surprised how often an NBA player punches random shit following a loss.”

If James cannot play in Wednesday’s Game 5 in Miami … well, that’d be ridiculous seeing as none of this actually happened.