Up-And-Coming Tennis Star Sloan Stephens Has SERIOUS Beef With Serena Williams

Sloan Stephens upset Serena in this year's Australian Open Quarterfinal. Literally. Then Serena got on the internet and tossed a not-so-cryptic jab at the 20-year-old. So it's no surprise Sloan is firing back in this week's ESPN The Magazine. All the juicy beef you can handle after the jump.