Stefanos Tsitsipas isn't the only top athlete from Greece. The world No. 5's friend, NBA star Giannis Antetokounmpo, comes from the very same city. Following his solid fourth-round win over Pablo Carreño Busta on Sunday afternoon in Paris, Tsitsipas made his way to the Tennis Channel desk for a second time this fortnight and opened up about their friendship.

"We speak from time to time," Tsitsipas told Tennis Channel host Steve Weissman. "He's very interested in my tennis life—which is much different from his. We've developed a good friendship, he's a very humble, nice, delicate man and there's so much in common that we share.

"He's a person that started from nothing and now he's at the top of the NBA. It's been really inspiring to see what he has achieved—with all the hard work and dedication, love and passion that he has for the sport. It makes me want to be the same."

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Antetokounmpo, known by many as the "Greek Freak," was first drafted by the Milwaukee Bucks in 2013. The 26-year-old was named the NBA's Most Valuable Player in 2019 and 2020—joining LeBron James and Kareem Abdul-Jabbar as the only players in NBA history to win two MVPs before turning 26.

With Tsitsipas vying for his first major title at Roland Garros and Antetokounmpo still alive in the NBA Playoffs—and looking to capture his first National Championship—the two are very busy but try to stay in touch.

"I'm the biggest Milwaukee fan. I don't really watch all the games but he has converted me into a Milwaukee fan," Tsitsipas said with a smile. "I'm rooting for them, I want them to go for the championship."

Tsitsipas edged into the quarterfinals on Sunday while Antetokounmpo and the Bucks took down the Miami Heat to reach the Eastern conference semifinals, inching both that much closer to picking up the ultimate hardware.

Tsitsipas will face No. 2 seed Daniil Medvedev next.