Monica Seles’ greatest victory wasn’t on the tennis courts.

As a teenager, Monica Seles won some historic matches on the tennis court, dominating opponents and filling a room with trophies. Her greatest win, though, came years later.

Born in Yugoslavia in 1973, amid Cold War tensions and communist supply shortages, she started playing tennis with her father at the age of 5 “for a little exercise.” She quickly took to the sport. By 11, she was an internationally recognized phenom, and her family moved to the United States so she could develop her potential and grow her career. In 1990, at the age of 16, she became the youngest person ever to win the French Open.

Retired from tennis, Martina Navratilova continues to push herself, and to use her gifts to inspire and help others.

With a tennis racket strapped tightly to her hiking pack, Martina Navratilova began her ascent of Mount Kilimanjaro. The tennis legend had visions of celebrating at the summit of Africa’s highest peak by hitting a couple balls to see how far they might fly in the thin air at 19,341 feet.