Nishikori Sails Into Second Week Of Australian Open 2017 Jan 20, 2017 Watch highlights as Kei Nishikori defeats Lukas Lacko in straight-sets to set up a fourth-round clash with Roger Federer. Photo: Getty Images. Video Courtesy Tennis Australia Tags: 2017 Australian Open Highlights Kei Nishikori Share 0 Share on Facebook Tweet Tweet on Twitter +1 +1 on Google Plus