Video PlayerClose
Switzerland's Stan Wawrinka answers questions during a press conference before the Australian Open tennis championships in Melbourne, Australia, on Jan. 13, 2018. (Xinhua/Bai Xuefei)
Switzerland's Stan Wawrinka answers questions during a press conference before the Australian Open tennis championships in Melbourne, Australia, on Jan. 13, 2018. (Xinhua/Bai Xuefei)