 Stefanos Tsitsipas has reached the Australian Open semi-finals for the fourth time in the last five years and will now take on Russian Karen Khachanov for a spot in Sundays final. The third seed made it six from six in the last eight at majors with a 6-3 7-6 7-2 6-4 victory over 21-year-old Lehecka, ... Australian Open: Stefanos Tsitsipas reaches semi-finals for... 