Maria Yuryevna Sharapova (Russian: Мари́я Ю́рьевна Шара́пова, IPA: [mɐˈrʲijə ˈjʉrʲjɪvnə ʂɐˈrapəvə] (listen); born April 19, 1987) is a Russian professional tennis player. Although she plays under the banner of Russia with the Women's Tennis Association (WTA), she has lived in and been a United States permanent resident since 1994. Sharapova has competed on the WTA tour since 2001. She has been ranked world No. 1 in singles by the WTA on five separate occasions, for a total of 21 weeks. She is one of ten women, and the only Russian, to hold the career Grand Slam. She is also an Olympic medalist, having won a silver medal in women's singles at the 2012 Summer Olympics in London. Sharapova has achieved a rare level of longevity in tennis. Several tennis pundits and former players have called Sharapova one of tennis's best competitors.