Bianca Vanessa Andreescu (born June 16, 2000 in Mississauga, Ontario, Canada) is a Canadian professional tennis player. She reached a career-high singles ranking of No. 143 on August 14, 2017, as ranked by the Women's Tennis Association (WTA), and a career-high combined junior ranking of No. 3 on February 1, 2016, as ranked by the International Tennis Federation (ITF). Andreescu won the 2017 Australian Open and French Open junior doubles titles with Carson Branstine. In 2014, Andreescu won Les Petits As, one of the most prestigious 14 and under tournaments in the world. She ended her 2014 season with the under-16 title at the Orange Bowl with a straight sets win over Dominique Schaefer, becoming the fourth straight Canadian after Erin Routliffe, Gloria Liang and Charlotte Robillard-Millette to win that event. At her first professional tournament, the ITF 25K in Gatineau in 2015, Andreescu advanced to the final with wins over No. 429 Elizabeth Halbauer, No. 288 Barbora Štefková, No. 206 Shuko Aoyama and No. 275 Victoria Rodríguez. She was defeated by No. 155 Alexa Glatch in the final. In 2015, at 15 years of age, she became the first Canadian since Gabriela Dabrowski in 2009 to win the under-18 Orange Bowl, a Grade A tournament on the junior circuit. She became the first to win the under-16 and under-18 titles in consecutive years since Mary Joe Fernández in 1984–85; Chris Evert is another to perform the feat. At the 2017 Wimbledon, she qualified for her first senior main draw but was defeated by Kristína Kučová in the opening round. In 2017 at the Citi Open, Andreescu was awarded a wildcard for the main draw and defeated Camila Giorgi in the opening round, her first win on the WTA Tour. In her next match, she upset world No. 13 Kristina Mladenovic, becoming the first player born in the 2000s to beat a top 20 player. She was defeated by Andrea Petkovic in three sets in the quarterfinals. Also in 2017 at the Coupe Banque Nationale, she reached the final in doubles with compatriot Carson Branstine, her first WTA final, losing to the first seeds Tímea Babos and Andrea Hlaváčková.
Andreescu was born in Mississauga and is of Romanian descent. Her middle name—Vanessa—was inspired by actress and singer Vanessa Williams. She moved to her parents' native country of Romania as a child and started playing tennis at age seven. Andreescu and her family moved back to Canada where she trained at the Ontario Racquet Club in Mississauga. When she was eleven years old, she joined Tennis Canada's U14 National Training Centre in Toronto for the 2011–2012 season. Due to the time spent on court, Andreescu is completing her high school degree online.