06/07/2010 05:12 am ET | Updated May 25, 2011

Martina Navratilova: I Have Breast Cancer

Martina Navratilova has breast cancer. The legendary tennis star revealed the news on "Good Morning America," telling Robin Roberts that she was "devastated" by the diagnosis, which she called her "personal 9/11."

Doctors performed a lumpectomy on Navratilova in February, and the 18-time Grand Slam singles champion said today that she is "okay and I'll make a full recovery." Scroll down to watch the interview.