This hottest, stylish and sexy Russian American retired professional tennis player, stands 9th on the World s Richest Tennis Players list. She has a net worth of $50 million. Her appearance and celebrity status made her one of the best known tennis stars worldwide, despite her never winning a WTA singles title. She reached the peak in her career playing doubles, where she had at times been the World No. 1 player. Along with her partner Martina Hingis, Kournikova won Grand Slam titles in Australia in 1999 and 2002. They often referred to themselves as the ?Spice Girls of Tennis .