Jessica Pegula acknowledges the crowd after defeating Anna Kalinskaya, of Russia, in a semifinal match at the Citi Open tennis tournament, Saturday, Aug. 3, 2019, in Washington. (AP Photo/Patrick Semansky)

Anna Kalinskaya, of Russia, returns the ball during a semifinal match against Jessica Pegula at the Citi Open tennis tournament, Saturday, Aug. 3, 2019, in Washington. (AP Photo/Patrick Semansky)

Jessica Pegula returns the ball during a semifinal match against Anna Kalinskaya, of Russia, at the Citi Open tennis tournament, Saturday, Aug. 3, 2019, in Washington. (AP Photo/Patrick Semansky)

Jessica Pegula , left,greets her dog Maddie during a victory ceremony after defeating Camila Giorgi, of Italy, in a final match at the Citi Open tennis tournament, Sunday, Aug. 4, 2019, in Washington. (AP Photo/Patrick Semansky)

Jessica Pegula reacts after defeating Camila Giorgi, of Italy, in a final match at the Citi Open tennis tournament, Sunday, Aug. 4, 2019, in Washington. (AP Photo/Patrick Semansky)

Jessica Pegula poses with a trophy after defeating Camila Giorgi, of Italy, in a final match at the Citi Open tennis tournament, Sunday, Aug. 4, 2019, in Washington. (AP Photo/Patrick Semansky)

Jessica Pegula reacts during a final match against Camila Giorgi, of Italy, at the Citi Open tennis tournament, Sunday, Aug. 4, 2019, in Washington. (AP Photo/Patrick Semansky)

Camila Giorgi, of Italy, serves the ball to Jessica Pegula during a final match at the Citi Open tennis tournament, Sunday, Aug. 4, 2019, in Washington. (AP Photo/Patrick Semansky)

Runner-up Camila Giorgi, left, of Italy, and winner Jessica Pegula pose for photographs after a final match at the Citi Open tennis tournament, Sunday, Aug. 4, 2019, in Washington. (AP Photo/Patrick Semansky)

Jessica Pegula poses with a trophy after defeating Camila Giorgi, of Italy, in a final match at the Citi Open tennis tournament, Sunday, Aug. 4, 2019, in Washington. (AP Photo/Patrick Semansky)

Camila Giorgi, of Italy, returns the ball to Jessica Pegula during a final match at the Citi Open tennis tournament, Sunday, Aug. 4, 2019, in Washington. (AP Photo/Patrick Semansky)

Jessica Pegula poses with a trophy and her dog Maddie after defeating Camila Giorgi, of Italy, in a final match at the Citi Open tennis tournament, Sunday, Aug. 4, 2019, in Washington. (AP Photo/Patrick Semansky)