Dave Hyde: Game 2 needs a new Whiteside.

This was new: Hassan Whiteside sat after practice Sunday and called out Hassan Whiteside. The Heat center said, “I have to be more aggressive.”

Every Miami Heat fan nods reading that.

“I wasn’t that aggressive,” Whiteside said of his play in Saturday’s Game 1 loss. More nods. “I was just trying to get a feel for the game early,” he said. “I’ve got to come out with the mindset that we’ve played them and they’re a different team without [center Joel] Embiid.

So we’ll see tonight in Game 2. See if Whiteside is different. See if he’s worth more than the 12 minutes he played in Game 1. See if he scores more than two points. See if he can make Philadelphia pay for guarding him with forwards.

We’ve moved past the point of wondering if Whiteside can be a unique and elite talent for this team. It’s downsized to if he can just be an advantage for a night against smaller players he should dominate.

“All the power and muscles areas — they have to feel that,” Heat coach Erik Spoelstra said.

All across the Heat practice at Temple University on Sunday, there was talk of embracing the right mindset, that it was just one loss and they just need to play their game.

No one should think this series is done. But Game 1 better not be a sign. The old warrior, Udonis Haslem, had it right when he said, “Before the X’s and O’s, we just need to compete. We didn’t do enough of that [in Game 1].”

They need Tyler Johnson and Justise Winslow to play tougher defense, Josh Richardson not to disappear against 76ers star Ben Simmons, and Goran Dragic to play like he usually does, too.

And Whiteside. They need him. His size, his strength, his full game should be the one distinct advantage the Heat has in this series.

“You have to make them pay for it,” he said at one point when asked if Philadelphia plays forward Ersan Ilyasova at center again.

A lot was made of the 76ers youth. But the Heat’s playoff inexperience showed in Game 1. It was playoff game No. 173 for Dwyane Wade, but he remembers his first series in 2003 for something more than his winning Game 7 shot.

“I remember Game 3,” Wade said. “That’s when I was like, ‘Oh, the playoffs are real.’ We had the first two games at home. I was averaging 20 coming out of those games. I think we blew them out once, feeling real good about ourselves.

“We went on the road in Game 3 and it seemed like every time I can [get] into the paint, P.J. Brown and Jamaal Magloire, they were just hitting me for no reason. I’d just pass them, run through, and I’d get a chuck. It was a physical game. I had a terrible game. I might’ve scored two points. I had a lot of turnovers. I left the game saying, ‘Oh, OK, so this is what the playoffs are like.’ I had to go from there.”

The Heat have to be that team, if they want to win. Simmons drove the lane with abandon — and no one fouled him hard. That’s not the Heat. At least it wasn’t the Heat when they mattered.

They had Alonzo Mourning fighting New York’s Larry Johnson, or Haslem bloodying up Indiana’s Tyler Hansbrough. Now the big guy capable of doing that is the biggest question on the team.

It says something that Spoelstra has expanded the games of everyone from LeBron James into an every-position player to James Johnson from a common journeyman. Yet he can’t seem to get through to Whiteside. If he can’t, can anyone? There was Whiteside, saying three times he has to be more “aggressive,” tonight. We’ll see if he is. There’s not much riding on it. The series. Probably his Heat future in some form.

“It’s just Game 1,” Whiteside said of Saturday’s loss. “It’s not the first game, won or lost. It’s a series.”

It’s time for him to enter this series a game late.

Dave Hyde