Roger Federer catches Nelly Korda's eye as he hits the golf greens for 'new hobby'

Roger Federer is trading forehands for ... well, Fore!

The Swiss star is taking up a "new hobby" popular with many retirees: The 20-time Grand Slam champion posted a video of himself teeing it up on the golf course to his Instagram account this week, wearing Uniqlo apparel, his signature "RF" logo cap in red, and stylish sunglasses.

While he needed little guidance to win seven Wimbledon titles, largely dominating the grass courts of the All-England Club in his playing career, Federer was eager to crowdsource tips for his new grass-course endeavor.

"Any pointers?" he quipped, asking for good luck wishes from his followers.

His good buddy, the retired skier Lindsey Vonn, was among those who replied with encouragement for his attempt on the tee, as did a host of his fellow tennis players including Carlos Alcaraz.

"Pretty sure you already nailed it!" she wrote.

"Is there something you are not good at?" Alcaraz asked.

But it was another comment from a different superstar athlete that Federer should take note of: LPGA world No. 1 Nelly Korda. The younger sister of ATP pro Sebastian Korda, who wrote her own chapter of golf history this spring by winning five titles in a row, took Federer up on his offer.

"Do you need a coach?" she quipped. (For the record, the other Kordas chimed in too: "Damn," Sebastian Korda simply said, while Jessica Korda, also an LPGA pro, hailed Federer's swing as "pure.")