After the Olympic tennis in Rio lost the Williams sisters, Murray brothers, Novak Djokovic and the top seeds in men's doubles on the same night, and then Serena Williams fell in singles shortly after, Catherine Whitaker and David Law reconvene on the Tennis Podcast. What is wrong with Novak Djokovic and Serena Williams? Could Juan Martin Del Potro now go all the way? What of Murray, Nadal, Konta, Kerber and the rest? It's all in there. The Tennis Podcast is produced in association with The Telegraph.  See acast.com/privacy for privacy and opt-out information.