UPDATE: Andreescu Wins 2019 U.S. Open

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Bianca Andreescu is officially the first Canadian to win a Grand Slam singles title.

The 19-year-old upset women's tennis legend Serena Williams 6-3, 7-5 in the U.S. Open women's final in New York Saturday.

Williams was in search of her 24th Grand Slam singles title, which would have tied the record, instead, Andreescu set a record of her own by becoming the first woman to win the U.S. Open in her tournament debut since the Open era began in 1968.

It's the second year in a row the 37-year-old Williams has lost in the U.S. Open final.

— with files from The Canadian Press.