Aliona Vadimovna Bolsova Zadoinova is a Spanish-Moldovan tennis player.

Bianca Andreescu defeated Serena Williams in the final, 6–3, 7–5 to win the women's singles tennis title at the 2019 US Open. It was her first major title, and she became the first Canadian, as well as the first player born in the 2000s, to win a major singles title. In addition, she was the youngest player since Svetlana Kuznetsova in 2004 to win a major singles title, and the first woman to win the US Open on her main draw debut. With the win, Andreescu entered the top 5 in rankings for the first time.