Serena Williams’ Ex-coach Stuns With $19M Steffi Graf Comparison to Jannik Sinner

Serena Williams’ Ex-coach Stuns With $19M Steffi Graf Comparison to Jannik Sinner

It goes without saying that Jannik Sinner has had quite a career so far, right? Twenty-four tour titles, four of them Grand Slams, and a staggering 58-6 win-loss record. But those aren’t the only numbers that define him. The Italian, currently ranked World No. 2 after spending 65 weeks at No. 1, has also earned a small fortune in prize money. And Rennae Stubbs couldn’t help but notice that he’s closing in on a legend’s milestone. Speaking on her…