ORLANDO, Fla. - Play time is over.

The trick shots that had become a ritual after Orlando Magic practices were gone Monday. So were the usual jokes and playful banter.

They were small but telling signs of just how much has changed in the Eastern Conference finals after the Boston Celtics took home-court advantage, shattering the Magic’s playoff invincibility.

Orlando will now have to overcome a loss for the first time in more than six weeks when the Magic face the resurgent Celtics in Game 2 of the Eastern Conference finals Tuesday night.

“It was a good wake-up call for us,” forward Matt Barnes said. “I can’t speak for everyone, but we may have been feeling ourselves too much. They kicked our tail last night, and now we have to get back to work.”

There’s plenty on the agenda.

The Celtics swarmed Dwight Howard from the opening tip, with four different big men — Kendrick Perkins, Rasheed Wallace, Glen Davis and Kevin Garnett — all taking turns. Boston bullied its way past the Magic in punishing fashion.

Howard was held to 13 points and 12 rebounds on 3-for-10 shooting. But he also had a game-high seven turnovers, some coming at the worst of times.

Boston’s scrappy play in the paint, elbows and forearms constantly jabbing, frustrated Howard again.

“I’m just playing him tough,” Wallace said. “The difference is I’m clean with it. Some guys who do that, they’re dirty with it. They’re walking under you when you’re shooting a jump shot. I’m just playing him tough.

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“I don’t do no dirty play. It’s just all tough.”

The ripple effect allowed the Celtics to close out fast on the Magic’s potent 3-point shooters, who went cold — especially early when Boston went ahead by 20 — and never allowed to get in rhythm. Orlando shot 41 percent from the field and 22 percent from beyond the arc.

The Magic, who swept Atlanta and Charlotte in the first two rounds, haven’t lost consecutive home games all season. They’re banking on that streak continuing heading into Game 2, or their hopes of redeeming last year’s NBA finals loss to the Lakers could be crushed.

“You can’t allow it to happen again,” Howard said.

While the Magic are trying to prove they can overcome adversity, the Celtics are looking to regain their knockout punch.

Streaky for parts of the season, the Celtics have only now started to find the defensive prowess that carried them to an NBA title two years ago. They spent the season, hobbled by injuries, dazzling one minute and baffling the next.

Boston coach Doc Rivers cautioned his team not to get overly excited Monday, knowing such success hasn’t lasted long. The Celtics haven’t won more than four straight — their current streak — since they won 11 in a row before Christmas.

“We didn’t handle (winning) well all year,” Rivers said. “When we won three or four in a row, you could count on it, ’Here it comes.’ And we’re a veteran team and we didn’t handle it well. It’s a human game at the end of the day.

“I always worry about that. I worry about us when we win one game, I really do,” Rivers said. “We just haven’t been the type of team, veteran teams usually handle that well, we have not all year.”

How the Magic will react after their first playoff setback is unknown.

They cruised through the first two rounds with relative ease, beating Atlanta by the largest margin of defeat in league history. Boston, of course, is a much more proven opponent.

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The Celtics went ahead 65-45 in the third quarter. Even if the slow start was the rust of a six-day layoff, Magic coach Stan Van Gundy doesn’t accept that as an excuse.

He was upset with the lack of effort and focus from his players more than anything.

“I was surprised to start a series with our energy level being what it was,” Van Gundy said. “I don’t think we ran in either direction. We didn’t get back defensively, probably the most disappointing thing.

“We didn’t make a big effort to get back, and then we just walked up the court offensively,” he added. “As good as they were defensively and as good as they are, I think we made it worse because we played right into their hands.”

After being the comeback team all of last season, the Magic now have do it again.

They twice returned from series deficits to win last year — including going down 3-2 to Boston in the second round — and overcame suspensions and injuries to starters. But the fact remains they haven’t been faced with such a challenge this postseason.

Until now.

“Nobody’s perfect,” said Magic forward Rashard Lewis, who had six points on just 2-for-10 shooting in Game 1. “It would have been great if we could have swept everybody and won a championship that way. But you’re going to lose games. Good teams bounce back from losses, and we’re a good team.”

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