World famous retired tennis player and coach Martina Navratilova has an estimated net worth of $15 million. Born Martina Subertova on October 18, 1956 in Prague, Czechoslovakia, he earned her net worth as a tennis player who won 18 Grand Slam singles titles, 31 Slam Women Doubles titles and 10 Grand Slam mixed doubles titles. She has also represented Czechoslovakia, the United States of America and Czech Republic. According to former World No. 1 player Billie Jean King, she is “the greatest singles, doubles and mixed doubles player who’s ever lived.”

Navratilova began winning championship titles at the age of 15. She reached the Wimble singles finals 12 times including nine consecutive years from 1982 to 1990. She won the Wimbledon women’s singles title at a record of nine times. She and King each won 20 Wimbledon titles – an all-time record. She is one of just three women to have accomplished a career Grand Slam “box set with” a Grand Slam in singles, women’s doubles and mixed doubles that she shared with Margaret Court and Doris Hart. She holds the open era record for the most singles titles (167) and doubles titles (177). She also recorded the longest winning streak in the open era with 74 consecutive matches and three of the six longest winning streaks in the women’s open era. Navratilova, together with Court and Maureen Connolly, share the record for the most consecutive major singles titles (six). She reached 11 consecutive major singles finals, second all-time to Steffi Graf’s 13.

In 1984, Navratilova and Pam Shriver won 109 consecutive matches in women’s doubles and won all four major titles. They also set an all-time record of 79 titles together and tied Louise Brough Clapp’s and Margaret Osborne duPont’s record of 20 major women’s doubles titles as a team. She has also won the season ending WTA Tour Championships with a record of eight times. She made the finals to a record of 14 times and won the doubles titles to a record of 11 times. She is the only person of either sex to have won eight different tournaments at least seven times.