With the Australian Open in its second week, we speak to the great Martina Hingis, who reached the final six times in a row. Can anyone stop Serena Williams? What would she advise a player to do against Williams? And what is her opinion of some of the up-and-coming stars? Are the age rules right these days given that Hingis was the World No.1 at 16 and retired at 22? What does she think of Andy Murray, and the impact of Ivan Lendl, and would she ever like to take a similar coaching role? All questions answered.After the five-set classic between Stanislas Wawrinka and Novak Djokovic, we also ask you whether it’s time for a 5th set tie-break in the final set of all Grand Slam tournaments. See acast.com/privacy for privacy and opt-out information.