Bianca Andreescu beat Serena Williams in the 2019 U.S. Open. This was a monumental win for her. She became the first Canadian to win a Grand Slam and the first player born in the year 2000 or later to do so. She also became the first tennis player to win a Grand Slam in her finals debut. The 19 year-old will slide into the top ten rankings for the first time in her career.
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