Zheng celebrates after defeating Świątek.
Mandatory Credit:	Andy Wong/AP via CNN Newsource

Zheng celebrates after defeating Świątek.
Mandatory Credit: Andy Wong/AP via CNN Newsource

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Four-time French Open champion and world No. 1 Iga Świątek loses in semifinals of women’s tennis singles tournament

Iga Świątek, the Polish world No. 1 and top seed in the Olympic tennis tournament, lost in the semifinals Thursday to China’s Zheng Qinwen, a massive upset in the women’s singles.