Russian tennis player Karen Khachanov has withdrawn from the tournament in Rotterdam, according to the tournament's Twitter page. The reason is not reported.
The prize fund of the tournament in Rotterdam is 2 million euros.
Karen Khachanov has not appeared on the court since January after losing to Stefanos Tsitsipas of Greece in the semifinals of the Australian Open.
Khachanov is ranked 13th in the Association of Tennis Professionals.
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