Nick Kyrgios of Australia reacts while competing against Roberto Bautista Agut of Spain during the ATP Cup semifinal match between Spain and Australia in Sydney, Australia, Jan. 11, 2020. (Xinhua/Zhu Hongye)

Nick Kyrgios of Australia reacts while competing against Roberto Bautista Agut of Spain during the ATP Cup semifinal match between Spain and Australia in Sydney, Australia, Jan. 11, 2020. (Xinhua/Zhu Hongye)

Nick Kyrgios of Australia competes against Roberto Bautista Agut of Spain during the ATP Cup semifinal match between Spain and Australia in Sydney, Australia, Jan. 11, 2020. (Xinhua/Zhu Hongye)

Roberto Bautista Agut of Spain competes against Nick Kyrgios of Australia during the ATP Cup semifinal match between Spain and Australia in Sydney, Australia, Jan. 11, 2020. (Xinhua/Zhu Hongye)

Roberto Bautista Agut of Spain celebrates after the match against Nick Kyrgios of Australia during the ATP Cup semifinal match between Spain and Australia in Sydney, Australia, Jan. 11, 2020. (Xinhua/Zhu Hongye)

Roberto Bautista Agut of Spain competes against Nick Kyrgios of Australia during the ATP Cup semifinal match between Spain and Australia in Sydney, Australia, Jan. 11, 2020. (Xinhua/Zhu Hongye)