Marc Lucero has coached Genie Bouchard, Nicole Gibbs, Allie Riske-Armitraj, Shelby Rogers and Steve Johnson, as well as coaching out of the USTA's West Coast facility in Carson, CA. Mark shares his background and talks about the role of a professional coach. He addresses overcoming vulnerabilities, ball recognition, how he grades success or failure, and how to play defense. Mark also shares his opinion on coaching on court and ball variation from week to week.