<Li> In 2006 , Navratilova became the oldest - ever Grand Slam tournament champion when she won the United States Open ( U.S. Open ) mixed doubles title . At that time she was just over a month away from her 50th birthday ( October 18 ) . Her partner , Bob Bryan , was born in 1978 , four years after she won her first Slam title . </Li>
<Li> In 2006 , Navratilova became the oldest - ever Grand Slam tournament champion when she won the United States Open ( U.S. Open ) mixed doubles title . At that time she was just over a month away from her 50th birthday ( October 18 ) . Her partner , Bob Bryan , was born in 1978 , four years after she won her first Slam title . </Li>
oldest female tennis player to win a major
oldest female tennis player to win a major
Navratilova
Navratilova