Simona Halep (born 27 September 1991) is a Romanian professional tennis player. She has been ranked world No. 1 in singles on two separate occasions between 2017 and 2019. She reached the No. 1 ranking for the first time on 9 October 2017. On her second occasion, she held the ranking for 48 consecutive weeks. In total, she has been No. 1 for 64 weeks, which ranks tenth in the history of women's tennis. Halep was the year-end No. 1 in 2017 and 2018. She is currently ranked world No. 7 on the WTA Tour, and has won 18 WTA singles titles.
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