LAUSANNE, SWITZERLAND - JULY 20: Bernarda Pera of United States plays a backhand during WTA Ladies Open Lausanne at Tennis Club Stade-Lausanne on July 20, 2019 in Lausanne, Switzerland. (Photo by RvS.Media/Robert Hradil/Getty Images)
LAUSANNE, SWITZERLAND - JULY 20: Bernarda Pera of United States plays a backhand during WTA Ladies Open Lausanne at Tennis Club Stade-Lausanne on July 20, 2019 in Lausanne, Switzerland. (Photo by RvS.Media/Robert Hradil/Getty Images)