Legendary tennis player and gay rights pioneer. Martina Navratilovaannounced on Monday that he had been diagnosed throat and breast cancer.

The Czech-American is considered one of the greatest players of all time to win overall. 59 Grand Slam titles in single and double.

“This double hit is serious but can be fixed,” the 66-year-old said, adding: “Hopefully for a favorable outcome. I will fight with everything I have.”

Navratilova, who was born in the Czech Republic, became a US citizen in 1981. She was also diagnosed with breast cancer in 2010, but then she managed to emerge victorious from this test.

Navratilova added that the cancer is at stage 1, the prognosis is good, and treatment will begin next week.