Carson Branstine

Branstine played her first junior tournament in November 2014 at the ITF G4 in Atlanta and won the doubles title.[7] Two weeks later at the G4 in Boca Raton, she captured her first junior singles title and also won in doubles.[8] In March 2015, she played her first professional tournament, losing to Karolína Stuchlá in the first round of the $10k in Gainesville, Florida.[9] In June 2015, she won the doubles title at the G4 in Haverford, Pennsylvania.[10] Branstine qualified for her first junior Grand Slam main draw at the US Open in September, but lost to Evgeniya Levashova in the opening round. She also reached the second round in doubles.[11]

In March, Branstine captured her second junior singles title with a victory over Ann Li at the G4 in Newport Beach, California.[12] She won her third junior singles title in June at the ITF G4 in Plantation, Florida.[13] In September, she reached the quarterfinals in singles of the junior US Open, upsetting the No. 2 seed Olesya Pervushina in the second round.[14] In November, she advanced to the semifinals in doubles at the $50k Toronto Challenger with partner Elena Bovina.[15] Also in November, she reached the doubles semifinals at the ITF GA in Mexico City.[16] In December, Branstine made it to the semifinals in singles and to the quarterfinals in doubles at the Eddie Herr ITF G1 in Bradenton, Florida.[17] The following week, she advanced to the semifinals of the GA Orange Bowl.[18]

In January at the Australian Open, Branstine reached the third round in girls' singles and captured the doubles title with Bianca Andreescu.[1] She started representing Canada officially in March and played her first tournament as a Canadian at the G1 in Carson, California at the end of the month, where she went on to win both the singles and doubles titles.[3][19] In June at the junior event of the French Open, Branstine lost in the opening round in singles, but won her second straight major doubles title with Bianca Andreescu.[2] In July at the G1 in Roehampton, she won the doubles title with Marta Kostyuk.[20] At Wimbledon, she lost in the quarterfinals in singles and in the semifinals in doubles with Kostyuk, ending her hopes of winning a third straight junior doubles Grand Slam title.[21] In August at the Rogers Cup, she was awarded a wildcard into the doubles main draw with compatriot Bianca Andreescu, her first WTA Tour main draw. They upset Kristina Mladenovic and Anastasia Pavlyuchenkova in the first round, before falling to the top seeds, Ekaterina Makarova and Elena Vesnina.[22] At the junior US Open in September, Branstine was defeated in the second round in both singles and doubles.[23] The following week at the Tournoi de Québec, she advanced with Andreescu to her first WTA Tour doubles final in which they were defeated by the top-seeded Tímea Babos and Andrea Hlaváčková.[24]