Karen Khachanov failed to reach the semifinals of the ATP-500 tournament in Halle, Germany.
In the quarterfinals Khachanov lost to German Oscar Otte 6-4, 6-7 (5-7), 4-6. The match lasted two hours and 10 minutes.
In the semifinals, Oscar Otte will become an opponent of the winner of the match Daniil Medvedev (Russia) - Roberto Bautista Agut (Spain).
Prize fund of the tournament is 2.1 million euros.
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