Alysa Liu became the first American women's figure skating world champion in nearly two decades Friday night, dethroning three-time defending champion Kaori Sakamoto with a brilliant free skate that earned her a standing ovation inside TD Garden.

Alysa Liu never expected to win the world championships. After all, the 19-year-old figure skater retired from the sport three years ago, only returning to training again a year ago and international competition six months ago.

Liu, 19, had retired from figure skating in 2022, three years after winning the U.S. championship as a 13-year-old