Following the news of Serena Williams' retirement from tennis, we look back at an April interview with tennis hall of famer John McEnroe who discusses the career of the legendary women's star. He points out that Williams has nothing left to prove and likens her to other greats like Tom Brady and LeBron James. DON'T FORGET TO SUBSCRIBE: https://www.youtube.com/channel/UCZ5C1HBPMEcCA1YGQmqj6Iw Follow us in social media: » Instagram: https://www.instagram.com/usatodayspo... » Facebook: https://www.facebook.com/usatodaysports/ » Twitter: https://twitter.com/usatodaysports?s=... USA TODAY delivers current local and national news, sports, entertainment, finance, technology, and more through award-winning journalism, photos, videos and VR. #serenawilliams #tennis #johnmcenroe #wta #womeninsports