Maria Sharapova is a Russian professional tennis player currently ranked #5 in the world. She has won 4 Grand Slam singles titles and been ranked #1 in the world for 21 weeks total. She turned professional in 2001 at age 14 and had her breakthrough in 2004 when she defeated Serena Williams at Wimbledon for her first Grand Slam title. Sharapova has struggled with injuries but returned to capture her fourth major title at the 2012 French Open, making her one of few to complete a career Grand Slam.