German tennis star Kerber announces pregnancy, to miss U.S. Open
The German wrote on Twitter on Wednesday, "I really wanted to play the US Open but eventually I decided that two against one just isn't a fair competition."
Kerber beat 19-year-old Ana Konjuh 6-3, 6-2 in the quarterfinals.
World No.2 Angelique Kerber of Germany and Danish player Caroline Wozniacki entered Dubai Open semi-finals, defeating their opponents in the quarter-finals.
Kerber, the 2016 champion of the Australian Open and the US Open both, beat 19-year-old Ana Konjuh 6-3, 6-2 on Thursday, reports Xinhua news agency.
Wozniacki also won in two straight sets when she defeated 17-year-old American talent Catherine Bellis 6-3, 6-2.
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Kerber will now take on Elina Svitolina on Friday, who overwhelmed Lauren Davis 6-0, 6-4 while Wozniacki will play Latvian player Anastasija Sevastova, who beat China's Qiang Wang 6-4, 7-5.
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