KEY BISCAYNE, FL - MARCH 23: Claire Liu returns a shot to Ashleigh Barty of Australia during the Miami Open Presented by Itau at Crandon Park Tennis Center on March 23, 2018 in Key Biscayne, Florida. (Photo by Matthew Stockman/Getty Images)
KEY BISCAYNE, FL - MARCH 23: Claire Liu returns a shot to Ashleigh Barty of Australia during the Miami Open Presented by Itau at Crandon Park Tennis Center on March 23, 2018 in Key Biscayne, Florida. (Photo by Matthew Stockman/Getty Images)