Khachanov into Australian Open semi-finals after Korda retires
Korda needed treatment on a wrist injury in the second set of their quarter-final before calling it quits when trailing 7-6 (7/5), 6-3, 3-0 to the Russian 18th seed on Rod Laver Arena.Khachanov's reward is a clash with either Greek third seed Stefanos Tsitsipas or unseeded Czech Jiri Lehecka, who play later, for a spot in Sunday's final.Victory equals the 26-year-old's best performance at a major after his semi-final run during last September's US Open, where he lost to Norway's Casper Ruud.


