(FILE PHOTO) Martina Navratilova Agrees To A Coaching Role With Agnieszka Radwanska Of Poland starting at the end of this year. BIRMINGHAM, ENGLAND - JUNE 15: Martina Navratilova of the United States takes part in an exhibition match during Day Seven of the Aegon Classic at Edgbaston Priory Club on June 15, 2014 in Birmingham, England. (Photo by Tom Dulat/Getty Images)