FILE - Australia's Ashleigh Barty serves to China's Saisai Zheng in their women's singles match during day two of the Wimbledon Tennis Championships in London, in this Tuesday, July 2, 2019, file photo. Barty is expected to compete in the Wimbledon tennis tournament that begins on Monday, June 28, 2021. (AP Photo/Kirsty Wigglesworth, File)