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Marin Cilic of Croatia hits a return during the Davis Cup World Group semifinal tennis match against Sam Querrey of the United States in Zadar, Croatia, Sept. 16, 2018. (Xinhua/Hrvoje Jelavic)
Marin Cilic of Croatia hits a return during the Davis Cup World Group semifinal tennis match against Sam Querrey of the United States in Zadar, Croatia, Sept. 16, 2018. (Xinhua/Hrvoje Jelavic)