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South Africa's Kevin Anderson returns the ball during second round match of Estoril Open Tennis tournament against Greece's Stefanos Tsitsipas in Cascais, near Lisbon, Portugal, May 3, 2018. (Xinhua/Zhang Liyun)
South Africa's Kevin Anderson returns the ball during second round match of Estoril Open Tennis tournament against Greece's Stefanos Tsitsipas in Cascais, near Lisbon, Portugal, May 3, 2018. (Xinhua/Zhang Liyun)