MIAMI — Heat All-Star power forward Chris Bosh has the answer to stopping Knicks rookie wonder Kristaps Porzingis: Try defending him.

At the Heat’s morning shootaround in advance of “Kristaps-mania’’ hitting Miami on Monday night, Bosh and Dwyane Wade said a lot of Porzingis’ success now is due to defenses leaving him open. Wade said that’s about to change.

“Pay attention to him — that’s really it,’’ Bosh said. “He deserves the attention. Most from what I see on the film is guys not paying attention to him. He can play basketball. I don’t know why. Just challenge him. He’ll hit tough shots, but we can’t allow him to get easy buckets. He’s really good at the elbow area. I see a lot of people fall asleep on the elbow area and it allows him to get catch-and-shoots. We got to pay close attention to him.

”If you get wide-open shots, yes, he’s a shooter. It creates rhythm. When you get a guy like that with an open 15-footer stepping right into it, you’re probably in for a long night.’’

Bosh added opponents aren’t boxing out enough on Porzingis, who had five offensive rebounds in the fourth quarter Saturday night in Houston to seal the Knicks’ victory. Porzingis finished with a historic stat line of 24 points, 14 rebounds and seven blocks.

The buzz of the NBA, Porzingis is averaging 13.2 points and 8.8 rebounds. The rookie-of-the-year candidate from Latvia will face a tough big-man tandem of Bosh and 7-foot-1 center Hassan Whiteside, who said he’s eager to see whether Porzingis really is 7 feet 3, as advertised.

Ironically, the Knicks will face Miami’s Justise Winslow, whom they considered drafting at No. 4. Winslow is having a fine rookie year, becoming the club’s best wing defender. He will spend a lot of time guarding Carmelo Anthony.

But the Knicks and their fans are ecstatic that Phil Jackson went European.

“He’s a rookie,’’ Wade said of why Porzingis is open a lot. “It takes a little time for a team and individuals to get on him. Right now Melo gets a lot of it, we have to plan for [Arron] Afflalo, guys who have been in this league. Maybe he’s been an afterthought. But he won’t be for long. No doubt about it. He’s really making waves around the league. It’s not just ESPN highlights. He’s putting up big numbers, playing big. He’s young, takes time for someone to plan for a rookie.’’

This is Porzingis’ first visit to the city of Miami. The Knicks are staying downtown, and Porzingis didn’t get to South Beach. “I’ve got to focus,’’ he said.

Speaking of focus, Porzingis said if defenses start focusing more on him, it will open things up for Anthony.

“Hopefully it will take a little more pressure off of Melo,’’ Porzingis said. “He’ll be a little more open. Most of the time he’s making situations for us and we’re wide open. … If I draw more attention from my defender, that makes other guys more open.’’

Wade says Porzingis deserves the hype.

“So many guys coming into the draft and see their potential, but never know if they’re able to reach it,’’ Wade said. “He’s done a great job in the toughest city for basketball. He’s a person you have to plan for every game — whether it’s scoring, offensive rebounding or shotblocking.’’

Miami coach Erik Spoelstra said he attended Porzingis’ pre-draft workout in Las Vegas in June, but couldn’t tell much because there was no contact.

“I saw him shoot about 500 jump shots without contact,’’ Spoelstra said. “No live play. How do you evaluate something like that? What you did notice was incredible touch, extremely long, skilled basketball player who can get up and down the floor. But that’s not my skill set — evaluating something like that. He’s so big and long and you see him step behind the 3 like he’s a guard. It’s unique.’’

Miami forward Amar’e Stoudemire was sick and didn’t attend the morning shootaround. He’s a game-time decision. He’s played in just two of 12 Heat games as Spoelstra has gone with a tight big-man rotation. Spoelstra said he remembers nearly trading for Stoudemire “six years ago’’ when he was in his contract year with Phoenix.

“He’s just been tremendous in understanding the big picture of staying ready, providing veteran leadership and not getting caught up in all the storylines outside,’’ Spoelstra said. “When his number was called the other night, he was extremely productive.”