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SAINT PETERSBURG, RUSSIA - MARCH 21: Daria Kasatkina of Russia poses with the champions trophy held up by brother Alexandr and coach Carlos Martinez after defeating Margarita Gasparyan of Russia in the final of the 2021 St. Petersburg Ladies Trophy at Sibur Arena on March 21, 2021 in Saint Petersburg, Russia (Photo by Robert Prange/Getty Images)

SAINT PETERSBURG, RUSSIA - MARCH 21: Daria Kasatkina of Russia poses with the champions trophy held up by brother Alexandr and coach Carlos Martinez after defeating Margarita Gasparyan of Russia in the final of the 2021 St. Petersburg Ladies Trophy at Sibur Arena on March 21, 2021 in Saint Petersburg, Russia (Photo by Robert Prange/Getty Images)