Swiatek winning easily, but knows who’s No. 1 at the US Open


              Fabio Fognini, of Italy, returns a shot to Rafael Nadal, of Spain, during the second round of the U.S. Open tennis championships, Thursday, Sept. 1, 2022, in New York. (AP Photo/Frank Franklin II)
            
              Rafael Nadal, of Spain, reacts after missing a shot against Fabio Fognini, of Italy, during the second round of the U.S. Open tennis championships, Thursday, Sept. 1, 2022, in New York. (AP Photo/Frank Franklin II)
            
              Serena Williams, center left, and Venus Williams, of the United States, depart after losing their first-round doubles match against Lucie Hradecká and Linda Nosková, of the Czech Republic, at the U.S. Open tennis championships, Thursday, Sept. 1, 2022, in New York. (AP Photo/Frank Franklin II)
            
              Serena Williams, of the United States, returns a shot during her first-round doubles match with Venus Williams, against Lucie Hradecká and Linda Nosková, of the Czech Republic, at the U.S. Open tennis championships, Thursday, Sept. 1, 2022, in New York. (AP Photo/Frank Franklin II)
            
              Serena Williams, right, and Venus Williams, of the United States, embrace after a loss in their first-round doubles match against Lucie Hradecká and Linda Nosková, of the Czech Republic, at the U.S. Open tennis championships, Thursday, Sept. 1, 2022, in New York. (AP Photo/Charles Krupa)
            
              Fabio Fognini, of Italy, returns a shot to Rafael Nadal, of Spain, during the second round of the U.S. Open tennis championships, Thursday, Sept. 1, 2022, in New York. (AP Photo/Frank Franklin II)
            
              Rafael Nadal, of Spain, reacts after missing a shot against Fabio Fognini, of Italy, during the second round of the U.S. Open tennis championships, Thursday, Sept. 1, 2022, in New York. (AP Photo/Frank Franklin II)
            
              Serena Williams, center left, and Venus Williams, of the United States, depart after losing their first-round doubles match against Lucie Hradecká and Linda Nosková, of the Czech Republic, at the U.S. Open tennis championships, Thursday, Sept. 1, 2022, in New York. (AP Photo/Frank Franklin II)
            
              Serena Williams, of the United States, returns a shot during her first-round doubles match with Venus Williams, against Lucie Hradecká and Linda Nosková, of the Czech Republic, at the U.S. Open tennis championships, Thursday, Sept. 1, 2022, in New York. (AP Photo/Frank Franklin II)
            
              Serena Williams, right, and Venus Williams, of the United States, embrace after a loss in their first-round doubles match against Lucie Hradecká and Linda Nosková, of the Czech Republic, at the U.S. Open tennis championships, Thursday, Sept. 1, 2022, in New York. (AP Photo/Charles Krupa)
            
              Rafael Nadal, of Spain, holds a bottle to his face during a medical timeout during a match against Fabio Fognini, of Italy, during the second round of the U.S. Open tennis championships, early Friday, Sept. 2, 2022, in New York. (AP Photo/Frank Franklin II)
            
              Serena Williams, center left, and Venus Williams, of the United States, depart after losing their first-round doubles match against Lucie Hradecká and Linda Nosková, of the Czech Republic, at the U.S. Open tennis championships, Thursday, Sept. 1, 2022, in New York. (AP Photo/Frank Franklin II)
            
              Serena Williams, of the United States, returns a shot during her first-round doubles match with Venus Williams, against Lucie Hradecká and Linda Nosková, of the Czech Republic, at the U.S. Open tennis championships, Thursday, Sept. 1, 2022, in New York. (AP Photo/Frank Franklin II)
            
              Serena Williams, right, and Venus Williams, of the United States, embrace after a loss in their first-round doubles match against Lucie Hradecká and Linda Nosková, of the Czech Republic, at the U.S. Open tennis championships, Thursday, Sept. 1, 2022, in New York. (AP Photo/Charles Krupa)
            
              Belinda Bencic, of Switzerland, returns a shot to Soraya Cirstea, of Romania, during the second round of the U.S. Open tennis championships, Thursday, Sept. 1, 2022, in New York. (AP Photo/Julia Nikhinson)
            
              Iga Swiatek, of Poland, reacts after defeating Sloane Stephens, of the United States, during the second round of the U.S. Open tennis championships, Thursday, Sept. 1, 2022, in New York. (AP Photo/Mary Altaffer)
            
              Victoria Azarenka, of Belarus, reacts after defeating Marta Kostyuk, of Ukraine, during the second round of the U.S. Open tennis championships, Thursday, Sept. 1, 2022, in New York. (AP Photo/Julia Nikhinson)
Swiatek winning easily, but knows who’s No. 1 at the US Open