Khachanov ends ailing Korda's run to reach Australian Open semi-final

Khachanov ends ailing Korda's run to reach Australian Open semi-final

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Khachanov ends ailing Korda's run to reach Australian Open semi-final

MELBOURNE (Reuters) - Karen Khachanov reached the semi-finals of the Australian Open for the first time on Tuesday after ailing American Sebastian Korda retired while trailing 7-6(5) 6-3 3-0.

The 18th seed raced out to a 4-1 lead before Korda calmed his nerves to force a tiebreak but the Russian hit back to win the first set with a backhand scorcher.

Korda, whose father Petr had triumphed at Melbourne Park in 1998, struggled on his forehand and had his right wrist strapped midway through a tight second set before Khachanov broke to go up 4-3 and the 26-year-old held firm to double his advantage.

With his injury affecting his rhythm and the match slipping away, 29th seed Korda dropped serve early in the third before throwing in the towel.

Khachanov will meet Stefanos Tsitsipas or Jiri Lehecka in the last four.