In Episode 51, Catherine and David review and the US Open and debate whether Serena Williams and Rafael Nadal will break the records of Steffi Graf and Roger Federer. And we hear from Mario Ancic, whose career was cut short, but who is making a good life for himself outside of tennis.

On the eve of the US Open finals between Serena Williams and Victoria Azarenka, and Rafael Nadal and Novak Djokovic, we enter the BBC Radio commentary box to get the views on what will happen from a woman that has beaten Serena - Jill Craybas, an Australian Open runner-up John Lloyd, the BBC's Tennis Correspondent Russell Fuller, and BBC producer Steve Jones.

With Serena Williams into the latter stages of the US Open, here's an interview in which she told David Law what's driving her, what goes on inside her mind ('the mind of a maniac', as she calls it), and how much the history books feature in her goals. Does she dream about tennis? Does she wake up with aches and pains? Find out, in our interview.

With one week gone, Catherine and David get stuck in to the US Open, review the exploits of Dan Evans and look ahead to that possible Federer vs Nadal showdown.