On this week's episode, host Jon Wertheim talks with Washington Kastles owner, investor, entrepreneur and philanthropist, Mark Ein. As a longtime fan and player of the sport, Ein discusses how he was introduced to tennis as a child and how his experiences as a ballkid growing up have influenced some of his business ventures as an adult. As the owner of the Washington Justice, a professional Overwatch esports team, Ein talks about what tennis can learn from the world of esports and how it can attract younger fans; why he decided to take control of the Citi Open in Washington, D.C. and much more.  Learn more about your ad choices. Visit megaphone.fm/adchoices