Getty Amanda Anisimova of the United States returns a serve. If tennis fans had any doubt that No. 9 ranked Amanda Anisimova could compete on a level with the world’s most elite players, the 24-year-old who was born to Russian immigrant parents in Freehold Township, New Jersey, left little remaining doubt on Thursday. Anisimova, a former teenage tennis star, handed former world No. 1, four-time Grand Slam tournament winner Naomi Osaka her first-ever defeat in a Grand Slam semifinal or final.