The Kazakhstani player defeated defending champion Aryna Sabalenka on Saturday, September 12, claiming both the New York trophy and the world No. 1 ranking, according to RFI.
American Pegula overcomes fellow American Navarro in three sets to set up a semifinal clash with top seed Aryna Sabalenka.
The Kazakhstani player claimed her third Grand Slam title on Saturday night by defeating Aryna Sabalenka in three sets, simultaneously taking the top spot in the world rankings.
World number one keeps bid for third consecutive US Open title alive with win over Linda Noskova.
Rybakina ended Aryna Sabalenka's 99-week reign at the top after reaching the US Open semifinals, according to the BBC.