3. Serena Williams – Tennis
Undoubtedly the best female tennis player in the world. Other than being the most successful female tennis player this sports woman is also one of the most charitable athletes in the world.She started her very own foundation called the Serena Williams foundation which helped to fund the construction of the Serena Williams Secondary School in Matooni, Kenya. Serena Williams also provides University and college schorlaships to the previlledge in the United States. In 2011, she was named the UNICEF Goodwill ambasador.