Fourhand is the Daily Spin's occasional roundup of various hits and pieces on tour.

POWERED  A few WTA stars, including Ana Ivanovic, Eugenie Bouchard and Caroline Wozniacki, speak to their personal catalysts for ever playing tennis in the first place, and the bulk of their answers include these names: Monica Seles, Steffi Graf, Serena Williams. It's part of the WTA's "Power to Inspire" campaign:

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STRIKE A POSE Vogue's latest issue features Carey Mulligan on the cover and Nick Kyrgios inside, further inciting the idea that Anna Wintour can foretell the future, in light of the 20-year-old Australian's high-profile takedown of Roger Federer in Madrid this week. Vogue's Mark Guiducci writes, “In person, Kyrgios has the lankiness of a Great Dane not fully grown and the swagger of a jock on the verge of greatness. He loves Drake’s new mix tape, recently bought himself a baby blue BMW M3, and offers expletive-laced rave reviews of Chipotle; as for that hair, he cuts it every four days. The diamond earring he’s wearing is a square pave situation he picked up in London, and it’s his favourite ‘because it’s the biggest.'” Elsewhere in the article, Justin Gimelstob calls Kyrgios "polarizing." And you've got to see why Kyrgios avoided meeting Michael Jordan at last year's U.S. Open. ​

THIS IDEA'S GOT BITE  Former ATP player Zack Fleishman will take his Shark Wheel invention to the Shark Tank investors on the show's May 15 episode (ABC, 8 p.m. ET).

ICYMI  Andy Murray wore his wedding ring on his tennis shoe in edging Philipp Kohlschreiber in the BMW Open in Munich last weekend. The Brit then faced the German again, for the second time in three days, in another three-setter, that at the Mutua Madrid Open.

Got a tip or a point to make? Hit me on Twitter at @jonscott9.