Olesya Sergeyevna Pervushina (Russian: Олеся Сергеевна Первушина; born 29 April 2000) is a Russian former tennis player. She is noted for her serve and powerful groundstrokes. Pervushina has achieved a career-high junior ranking of No. 1, on 6 June 2016. In May 2016, she won the Trofeo Bonfiglio, a Grade-A tournament in Milan, Italy.