Serena Williams, 37, did not cope with the 19-year-old’s quality in United States Open on Saturday.
Williams was defeated 6-3, 7-5, in the women’s final, held in New York, by Bianca Andreescu, a Canadian athlete.
Andreescu made history becoming the first Canadian to win a grand slam.
Canadian 15th seed Andreescu, in the main draw here for the first time, blew a double break in the second set before taking her third match point and falling to the ground in disbelief.
“This year has been a dream come true,” Andreescu told the crowd.
Andreescu had not even been born when Williams won her first grand slam title in 1999 at the U.S. Open.
This is the second year in a row that Williams has lost in the final at Flushing Meadows.