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He's coming home: In a new video for the ATP, Holger Rune takes fans back to his native Denmark, pulling back the curtain on how the 20-year-old has grown up to be one of the best players in the world.

Rune was born in the northern Copenhagen suburb of Gentofte to parents Aneke Rune and Anders Nødskov, and reveals in the clip that he started playing tennis because of his sister Alma, who was the first player in the family. She recalls that her brother showed dedication from an early age—a personality trait that's highlighted ofter in the 16-minute mini-documentary.

"We practiced a lot together," Alma recalls. "My mom would book a court, and we would just practice until it was dark in the evening."

In addition to his family, the video also features interviews with Rune's longtime coach Lars Christensen, who started working with Rune when he was 7, to paint a full picture; Christensen, a former ATP pro himself, traces Rune's path from a precocious child, to a world-class junior, to one of the best players in the world—and the limitless potential that he still has to improve.

Rune calls himself tennis-obsessed—"I don't think about tennis 24/7, but I think about what's necessary for my tennis 24/7," he says—and it's a quality that Christensen notes will serve him well in his quest to reach the top.

"If you want to become the very best in the sport," Christensen says, "you're never going to reach it if you don't have that drive."

The video culminates with snapshots of some of the history Rune's made in the last 12 months—namely, his win over Novak Djokovic in the final of the Paris Rolex Masters last fall to become the youngest champion in Paris since Boris Becker in 1986. He beat five Top 10 players to win in Paris, the first player to do that outside of the ATP Finals, and cracked the Top 10 as a result.

In addition to training clips and match highlights, the video also shows Rune socializing with his parents, sister and friends away from the court, and he credits them for committing to all that comes with the life of a professional tennis player just as much as he has.

"I see in the big picture that I have a big dream, and no matter how I feel, I want to reach that dream," Rune says.

"I'm very young, and I have the right people around me, so I feel like this is going to be it. I'm going to keep doing it this way."

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