Clare Balding Show: Can Clare beat Martina Navratilova?

Clare Balding takes on 18-time grand slam champion Martina Navratilova at cereal box tennis, with Judy Murray officiating.

Watch the full interview with Navratilova, and Judy Murray on the Clare Balding Show, Friday 8 May, 22:00 BST on BBC Two and the BBC Sport website.