Carla Wozniacki beats Magdalena Rybarikova 2-0 at Australian Open 2018

Caroline Wozniacki of Denmark serves during the women's singles fourth round match against Magdalena Rybarikova of Slovakia at Australian Open 2018 in Melbourne, Australia, Jan. 21, 2018. Carla Wozniacki won 2-0. (Xinhua/Li Peng)