Martina Hingis – $25 Million
Starting at the age of 14 in 1994, Martina earned $24 million merely via prize money during her 23 year tennis career and also she is the youngest ever to have won a major tournament and be ranked at number one.She also won all four tournaments during one grand slam calendar year in 1998, as she won Wimbledon along with US, French and Australian opens in doubles in the same year. With her 25 major tournaments and number of endorsements, Martina is worth a whopping $25 million today.