BOSTON — While there are injury concerns as the Celtics head into the playoffs, that doesn’t include Kristaps Porzingis. The talented big man dealt with some frustrating setbacks throughout the regular season, but now, he enters the postseason healthy and ready to go.

For the Celtics to be at their absolute best — and with a shot at back-to-back titles — they need Porzingis to be healthy and productive. So he enters a crucial playoffs where the team will rely on him to step up in the biggest moments. That starts Sunday in Game 1 against the Magic in the first-round series.

“I feel good,” Porzingis said of his condition. “Taking care of my body. It’s good to have these few days off, of course, not just for myself but I’m sure for a lot of guys. Yeah, I’m feeling good, feeling healthy and ready to go.”

Porzingis started slow when he was back on the court last November. He was forced to miss the first month of the season as he needed foot surgery. But since then, he’s been relatively healthy when it comes to his body and any foot issues. Porzingis averaged 19.5 points, 6.8 rebounds and 2.1 assists in 42 games (all starts) this season, shooting 41.2% on his 3-pointers.

While he didn’t have lingering foot or other issues, he battled a viral illness in the middle of the year. The big man admitted his irritation by it, including sending out a public statement for the fans updating his condition. So even with Porzingis ramping up his play, the illness was another setback.

All will be forgotten if Porzingis can put together a fully-healthy playoff run. That wasn’t the case last year, when a calf strain in the first round against the Heat knocked him out until the NBA Finals. Then against the Mavericks, his old team, he suffered his rare foot injury that severely limited him and required surgery.

Porzingis has yet to play more than seven playoff games in one year. At this point, even though he’s shown off his unicorn-like talent in the regular season, his playoff performance is still a relative question mark. So with the Celtics facing a physical, defensive Magic squad, some of the spotlight will be on Porzingis’ performance.

“Of course the intensity is higher,” Porzingis said. “There’s more physicality, maybe a bit less fouls called. But that’s all part of the game and you just get used to it. It’s just like a regular-season game. Some games, you get more foul calls. Some games, the referees just let it go and you just adjust as a player.”

The Celtics are also dealing with some other injury issues aside from Porzingis, namely Jaylen Brown’s bone bruise in his right knee. The last time Brown saw the court, he looked limited in the overtime win over the Knicks. But all reports from practice this week have been optimistic as Brown’s teammates praised how he looked behind the scenes.

So that puts extra importance for Porzingis to contribute if Brown isn’t 100% healthy. Of course, it’s not just on him as the Celtics are dangerous because their entire team can go off any given night. But as the C’s embark on their journey for Banner No. 19, they’ll need everyone at their best -- and Porzingis is right there as part of that group.

“I don’t think it’s going to be night-and-day different from the regular season,” Porzings said. “Of course the intensity’s higher, the attention to detail. But at the end, it’s just basketball. We’re going to play, and in a seven-game series, most of the team, the best team wins.”