January 11, 2019 - Sydney, NSW, U.S. - SYDNEY, AUSTRALIA - JANUARY 11: Kiki Bertens (NED) unhappy with herself in her game against Ashleigh Barty (AUS) at The Sydney International Tennis on January 11, 2018, at Sydney Olympic Park Tennis Centre in Homebush, Australia. (Photo by Speed Media/Icon Sportswire) (Credit Image: © Steven Markham/Icon SMI via ZUMA Press)