Switzerland's Stan Wawrinka competes during men's singles fourth round match against Italy's Andreas Seppi at the Australian Open tennis championships in Melbourne, Australia, Sunday, Jan. 22, 2017. Stan Wawrinka won 3-0. (Xinhua/Zhu Hongye)
Switzerland's Stan Wawrinka competes during men's singles fourth round match against Italy's Andreas Seppi at the Australian Open tennis championships in Melbourne, Australia, Sunday, Jan. 22, 2017. Stan Wawrinka won 3-0. (Xinhua/Zhu Hongye)