Casper Ruud still chasing US Open title, No. 1 ranking


              Karen Khachanov, of Russia, returns to Nick Kyrgios, of Australia, during the quarterfinals of the U.S. Open tennis championships, Tuesday, Sept. 6, 2022, in New York. (AP Photo/Frank Franklin II)
            
              Nick Kyrgios, of Australia, is attended by a trainer as he plays Karen Khachanov, of Russia, during the quarterfinals of the U.S. Open tennis championships, Tuesday, Sept. 6, 2022, in New York. (AP Photo/Charles Krupa)
            
              Nick Kyrgios, of Australia, takes a break as he play Karen Khachanov, of Russia, during the quarterfinals of the U.S. Open tennis championships, Tuesday, Sept. 6, 2022, in New York. (AP Photo/Frank Franklin II)
            
              Karen Khachanov, of Russia, reacts as he wins a point against Nick Kyrgios, of Australia, during the quarterfinals of the U.S. Open tennis championships, Tuesday, Sept. 6, 2022, in New York. (AP Photo/Frank Franklin II)
            
              Karen Khachanov, of Russia, celebrates after defeating Nick Kyrgios, of Australia, during the quarterfinals of the U.S. Open tennis championships, Wednesday, Sept. 7, 2022, in New York. (AP Photo/Frank Franklin II)
            
              Karen Khachanov, of Russia, right, shakes hands with Nick Kyrgios, of Australia, at the end of a quarterfinal match the U.S. Open tennis championships, Wednesday, Sept. 7, 2022, in New York. Khachanov won the match. (AP Photo/Frank Franklin II)
            
              Karen Khachanov, of Russia, celebrates after defeating Nick Kyrgios, of Australia, during the quarterfinals of the U.S. Open tennis championships, Wednesday, Sept. 7, 2022, in New York. (AP Photo/Charles Krupa)
            
              Nick Kyrgios, of Australia, tosses his racket as he plays Karen Khachanov, of Russia, during the quarterfinals of the U.S. Open tennis championships, Tuesday, Sept. 6, 2022, in New York. (AP Photo/Charles Krupa)
            
              Karen Khachanov, of Russia, returns to Nick Kyrgios, of Australia, during the quarterfinals of the U.S. Open tennis championships, Tuesday, Sept. 6, 2022, in New York. (AP Photo/Frank Franklin II)
            
              Nick Kyrgios, of Australia, is attended by a trainer as he plays Karen Khachanov, of Russia, during the quarterfinals of the U.S. Open tennis championships, Tuesday, Sept. 6, 2022, in New York. (AP Photo/Charles Krupa)
            
              Nick Kyrgios, of Australia, takes a break as he play Karen Khachanov, of Russia, during the quarterfinals of the U.S. Open tennis championships, Tuesday, Sept. 6, 2022, in New York. (AP Photo/Frank Franklin II)
            
              Karen Khachanov, of Russia, reacts as he wins a point against Nick Kyrgios, of Australia, during the quarterfinals of the U.S. Open tennis championships, Tuesday, Sept. 6, 2022, in New York. (AP Photo/Frank Franklin II)
            
              Karen Khachanov, of Russia, celebrates after defeating Nick Kyrgios, of Australia, during the quarterfinals of the U.S. Open tennis championships, Wednesday, Sept. 7, 2022, in New York. (AP Photo/Frank Franklin II)
            
              Karen Khachanov, of Russia, right, shakes hands with Nick Kyrgios, of Australia, at the end of a quarterfinal match the U.S. Open tennis championships, Wednesday, Sept. 7, 2022, in New York. Khachanov won the match. (AP Photo/Frank Franklin II)
            
              Karen Khachanov, of Russia, celebrates after defeating Nick Kyrgios, of Australia, during the quarterfinals of the U.S. Open tennis championships, Wednesday, Sept. 7, 2022, in New York. (AP Photo/Charles Krupa)
            
              Nick Kyrgios, of Australia, tosses his racket as he plays Karen Khachanov, of Russia, during the quarterfinals of the U.S. Open tennis championships, Tuesday, Sept. 6, 2022, in New York. (AP Photo/Charles Krupa)
            
              Karen Khachanov, of Russia, returns to Nick Kyrgios, of Australia, during the quarterfinals of the U.S. Open tennis championships, Tuesday, Sept. 6, 2022, in New York. (AP Photo/Frank Franklin II)
            
              Nick Kyrgios, of Australia, is attended by a trainer as he plays Karen Khachanov, of Russia, during the quarterfinals of the U.S. Open tennis championships, Tuesday, Sept. 6, 2022, in New York. (AP Photo/Charles Krupa)
            
              Nick Kyrgios, of Australia, takes a break as he play Karen Khachanov, of Russia, during the quarterfinals of the U.S. Open tennis championships, Tuesday, Sept. 6, 2022, in New York. (AP Photo/Frank Franklin II)
            
              Karen Khachanov, of Russia, reacts as he wins a point against Nick Kyrgios, of Australia, during the quarterfinals of the U.S. Open tennis championships, Tuesday, Sept. 6, 2022, in New York. (AP Photo/Frank Franklin II)
            
              Nick Kyrgios, of Australia, tosses his racket as he plays Karen Khachanov, of Russia, during the quarterfinals of the U.S. Open tennis championships, Tuesday, Sept. 6, 2022, in New York. (AP Photo/Charles Krupa)
            
              Casper Ruud, of Norway, reacts after defeating Matteo Berrettini, of Italy, during the quarterfinals of the U.S. Open tennis championships, Tuesday, Sept. 6, 2022, in New York. (AP Photo/Seth Wenig)
            
              Matteo Berrettini, of Italy, reacts after losing a point to Casper Ruud, of Norway, during the quarterfinals of the U.S. Open tennis championships, Tuesday, Sept. 6, 2022, in New York. (AP Photo/Seth Wenig)
            
              Casper Ruud, of Norway, right, shakes hands with Matteo Berrettini, of Italy, after winning their quarterfinal match of the U.S. Open tennis championships, Tuesday, Sept. 6, 2022, in New York. (AP Photo/Seth Wenig)
            
              Matteo Berrettini, of Italy, reacts during a quarterfinal match against Casper Ruud, of Norway, during the U.S. Open tennis championships, Tuesday, Sept. 6, 2022, in New York. (AP Photo/Seth Wenig)
Casper Ruud still chasing US Open title, No. 1 ranking