Nineteen-year-old tennis superstar Bianca Andreescu said she still can't believe she won her first grand slam tournament on Sept. 11 in Toronto, while speaking to media. She came fresh off capturing the U.S. Open women’s title, making history as the first Canadian to win.

Andreescu beat one of the most successful players of all time, Serena Williams, in straight sets (6-3, 7-5).

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