After Bianca Andreescu won her United States Open semifinal on Thursday night, Pam Shriver of ESPN told her in a postmatch interview that a year ago, “I don’t think I’d heard of you.”

By Saturday night, Andreescu, 19-year-old Canadian, was a Grand Slam champion after she defeated Serena Williams, 6-3, 7-5, in the final.

Though well off the radar last year, Andreescu has created buzz throughout her stunningly rapid rise to the top of tennis this season, when she has compiled a 45-4 record.

Aug. 22, 2018

Ranking: 208

In the first round of the United States Open qualifying tournament, Andreescu loses to Olga Danilovic, 6-3, 7-5.