15
Jan
It was late September when Naomi Osaka, the four-time Grand Slam champion and transcendent star of her sport, finally got on the phone with her former coach to talk about her next comeback. Wim Fissette is a cerebral Belgian who thinks long and hard before taking on a player, even one with a resume like Osaka’s. He had one, very serious question.Is it going to be different this time?There was then another conversation, with Florian Zitzelsberger, a 34-year-old German who is one of the most respected strength and conditioning coaches in the world. Zitzelsberger had worked with Osaka before, too. He…