Rogers, ranked 43rd in the world, took the first set, but Barty bounced back to level the match at a set apiece. Barty led the third set 5-2 and was serving for the match before Rogers mounted a furious comeback to force a decisive tiebreak.
Rogers won the tiebreak to stun the crowd at Arthur Ashe Stadium at the USTA Billie Jean King National Tennis Center.
It was Rogers’ first win against a No. 1-ranked opponent and her first in six matches against Barty, five of which were in the 2021 season, according to a Women’s Tennis Association (WTA) report on the match.
Rogers, 28, moves on to the round of 16 at the US Open for the second straight year. She reached the quarterfinals a year ago.
She will face Britain’s Emma Raducanu in the round of 16 on Monday. The 18-year-old Raducanu beat Sara Sorribes Tormo of Spain 6-0, 6-1 earlier Saturday.