After topping the World Rankings for the second year in a row amidst personal problems and against some of the greatest tennis players of all time, Novak Djokovic assesses whether 2011 or 2012 was the more impressive year. David and Catherine also weigh into the debate, with differing opinions that result in a full-scale argument. We also hear from Roger Federer on his year, and review the ATP World Tour Finals at the 02 Arena. And finally, who won David and Catherine's prediction competition? Do they even know? See acast.com/privacy for privacy and opt-out information.