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Billie Jean King, Ilana Kloss and Magic Johnson were in the stadium for the big moment.

Krajinovic brought some of his best stuff, but the world No. 1 answered the challenge.

He received a pair of shoes and a signed jersey with a special message on it.

The US Open champion paid a special visit to the animals at Austria's Schonbrunn Zoo.

"Nick, you were my favorite tennis athlete ... but now it's Nadal," the NBA star said.

Wozniacki summited the mountain alongside her husband, parents, brother and mother-in-law.

The Roland Garros champion answered questions on Red Bull's Instagram story.

"I have always had the utmost respect for my friend Rafa," Federer wrote.

After winning the title over Kenin, Swiatek was showered with praise online. 

The world No. 54 shared a photo of the pair playing exhibition doubles together in Poland.

"He's like a Swiss knife," Stefanos said of his father and his many roles.

For two different shots, the teen was picked by both Tennis Channel and Roland Garros.

ATP players made a fun video answering questions about their colleagues. 

"We're really on it for a second year in a row tho," Osaka wrote on an Instagram story.