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Poland's Grzegorz Krychowiak attends a training session ahead of the 2018 Russia World Cup, in Warsaw, Poland, on June 11, 2018. (Xinhua/Maciej Gillert)
Poland's Grzegorz Krychowiak attends a training session ahead of the 2018 Russia World Cup, in Warsaw, Poland, on June 11, 2018. (Xinhua/Maciej Gillert)