I love that this happened. So apparently Serena Williams sent a friendly troll to Kim Kardashian regarding her tennis stance in a photo. On Saturday, Kim K posted a set of Instagram photos wearing a hot pink Chanel bikini and posing on a tennis court. Serena commented on the post with the fact that this is indeed not how you hold a racket and that she needed to give the celeb some lessons. I didn't know that these two have known each other for over 20 years and met when Kim K was organizing her closet, which she used to do before hitting major fame.