Amanda Anisimova (/əˈnɪsɪmoʊvə/ ə-NIS-ih-moh-və; born August 31, 2001) is an American professional tennis player. She is the youngest player ranked in the top 100 by the Women's Tennis Association (WTA) and has a career-high ranking of No. 26 in the world. Anisimova won her first WTA title at the Copa Colsanitas in April 2019 at the age of 17.
With her father Konstantin as her longtime coach and her older sister also an accomplished player, Anisimova began playing tennis at a very young age. Born in New Jersey, her family moved to Florida to give their children better training opportunities. As a junior, Anisimova was ranked as high as No. 2 in the world. She won the 2017 Junior US Open, as well as two other Grade A titles. She also became the first American finalist at the French Open girls' singles tournament in 14 years.
On the pro tour, Anisimova defeated a top 150 opponent before turning 15. She won her first ITF pro circuit title less than a year later. She then rose to prominence at the 2018 Indian Wells Open by recording her first top 10 victory against Petra Kvitová while still 16 years old. Anisimova first cracked the top 100 in 2018. Her next breakthroughs came at the first two Grand Slam events of 2019. At the Australian Open, she upset No. 11 Aryna Sabalenka, one of the leading contenders for the title, to reach the fourth round. She then upset the defending champion and world No. 3 Simona Halep at the French Open to become the youngest semifinalist at the tournament in over a decade.