David Quinn saw the change in Filip Chytil right away this summer, something that helps make the 20-year-old a clear-cut favorite to be the Rangers’ second-line center on opening night.

After all the splashy additions this offseason — the signing of Artemi Panarin, the trades for Jacob Trouba and Adam Fox, the pick of Kaapo Kakko with the No. 2-overall selection in June’s draft — it seems like Chytil went somewhat overshadowed. But as training camp continued with three group practices on Sunday at the team’s facility in Tarrytown, the maturation of Chytil now with one season under his belt was unmistakable.

“He looks different this year,” said Quinn, the Rangers’ coach. “He just looks different. He looks a little bit more mature, he looks more confident. There was an awful lot going on for him last year. He’s just carrying himself differently. I think he thinks he belongs.

“If you’re going to be a great player in this league, you’ve got to have some swagger.”

Chytil was always affable as a rookie, but the big Czech smile is now backed up with a far better handle of English. He said he got stronger, adding some bulk to his 6-foot-2, 200-pound frame. That will certainly help during the grind of an 82-game regular season, which wore him down this last year — as it would most 19-year-olds.

“Fil isn’t different [from] a lot of 19-year-olds,” Quinn said. “When you get in this league, I think there is a little bit of trepidation and a little bit of uncertainty. And I think he’s over that.”

Chytil went home for almost all of the summer and returned about a month ago, working with renowned trainer Ben Prentiss in Stamford, Conn. He came into camp knowing that there is an opportunity for him to get more ice time and play in more situations — and he hopes to grab the chance.

“I know when I [got] to the offseason what I had to improve,” Chytil said. “I’m here right now and trying to prove that I can play better than last year, and I’ll be better after the summer.”

In his first year, Chytil bounced from center to wing as Quinn tried to get him on the ice any way he could — other than those times when he was stapled to the bench for learning purposes. But things are now open down the middle behind true No. 1 pivot — and possibly new captain — Mika Zibanejad. And so a lot of the young players are going back to their natural positions at center, including Chytil.

“Center is my natural position, so I like to fight for that spot,” he said. “I’m going to try to be in that spot and play second[-line] center and create a position in the team, play more minutes and be on the ice for important things.”

Also vying for that spot is Lias Andersson, who was taken at No. 7 in the 2017 draft — 14 spots ahead of Chytil — but spent most of the past year working on his game down at AHL Hartford. Brett Howden, an integral piece in the trade that sent J.T. Miller and Ryan McDonagh to the Lightning, also played 66 games at center for the Rangers last season and will be returning. It seems to have pushed Ryan Strome — going into the final year of his contract — to the wing and leaves little room for Boo Nieves, at least to start.

But at this point in training camp, any sense of a depth chart is still a work in progress.

“I’d like to give these guys some stability and put them in a position,” Quinn said. “But when you look at the league, and you have high-end players, when they get into the league at a young age, they’re all centers. A lot of them are asked to play the wing early on in their career, and then they learn to play the middle because it’s such a demanding position.

“That being said, I want to see Fil Chytil in the middle.”