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Polish referee Szymon Marciniak (C) reacts as Argentina's midfielder Javier Mascherano (L) and Iceland's midfielder Emil Hallfredsson (R) lie on the ground during the Russia 2018 World Cup Group D football match between Argentina and Iceland at the Spartak Stadium in Moscow on June 16, 2018. / AFP PHOTO / Mladen ANTONOV / RESTRICTED TO EDITORIAL USE - NO MOBILE PUSH ALERTS/DOWNLOADS