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Serbia's forward Aleksandar Mitrovic celebrates scoring during their Russia 2018 World Cup Group E football match between Serbia and Switzerland at the Kaliningrad Stadium in Kaliningrad on June 22, 2018. (Photo by OZAN KOSE / AFP) / RESTRICTED TO EDITORIAL USE - NO MOBILE PUSH ALERTS/DOWNLOADS (Photo credit should read OZAN KOSE/AFP/Getty Images)

Serbia's forward Aleksandar Mitrovic celebrates scoring during their Russia 2018 World Cup Group E football match between Serbia and Switzerland at the Kaliningrad Stadium in Kaliningrad on June 22, 2018. (Photo by OZAN KOSE / AFP) / RESTRICTED TO EDITORIAL USE - NO MOBILE PUSH ALERTS/DOWNLOADS        (Photo credit should read OZAN KOSE/AFP/Getty Images)

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Serbia's midfielder Sergej Milinkovic-Savic (top C) celebrates a goal by forward Aleksandar Mitrovic with teammates during their Russia 2018 World Cup Group E football match between Serbia and Switzerland at the Kaliningrad Stadium in Kaliningrad on June 22, 2018. (Photo by Attila KISBENEDEK / AFP) / RESTRICTED TO EDITORIAL USE - NO MOBILE PUSH ALERTS/DOWNLOADS (Photo credit should read ATTILA KISBENEDEK/AFP/Getty Images)

Serbia's midfielder Sergej Milinkovic-Savic (top C) celebrates a goal by forward Aleksandar Mitrovic with teammates during their Russia 2018 World Cup Group E football match between Serbia and Switzerland at the Kaliningrad Stadium in Kaliningrad on June 22, 2018. (Photo by Attila KISBENEDEK / AFP) / RESTRICTED TO EDITORIAL USE - NO MOBILE PUSH ALERTS/DOWNLOADS        (Photo credit should read ATTILA KISBENEDEK/AFP/Getty Images)

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Serbia's forward Aleksandar Mitrovic (C) celebrates with teammates after scoring the opening goal during the Russia 2018 World Cup Group E football match between Serbia and Switzerland at the Kaliningrad Stadium in Kaliningrad on June 22, 2018. (Photo by Patrick HERTZOG / AFP) / RESTRICTED TO EDITORIAL USE - NO MOBILE PUSH ALERTS/DOWNLOADS (Photo credit should read PATRICK HERTZOG/AFP/Getty Images)

Serbia's forward Aleksandar Mitrovic (C) celebrates with teammates after scoring the opening goal during the Russia 2018 World Cup Group E football match between Serbia and Switzerland at the Kaliningrad Stadium in Kaliningrad on June 22, 2018. (Photo by Patrick HERTZOG / AFP) / RESTRICTED TO EDITORIAL USE - NO MOBILE PUSH ALERTS/DOWNLOADS        (Photo credit should read PATRICK HERTZOG/AFP/Getty Images)

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Serbia's forward Aleksandar Mitrovic (R) celebates scoring during their Russia 2018 World Cup Group E football match between Serbia and Switzerland at the Kaliningrad Stadium in Kaliningrad on June 22, 2018. (Photo by OZAN KOSE / AFP) / RESTRICTED TO EDITORIAL USE - NO MOBILE PUSH ALERTS/DOWNLOADS (Photo credit should read OZAN KOSE/AFP/Getty Images)

Serbia's forward Aleksandar Mitrovic (R) celebates scoring during their Russia 2018 World Cup Group E football match between Serbia and Switzerland at the Kaliningrad Stadium in Kaliningrad on June 22, 2018. (Photo by OZAN KOSE / AFP) / RESTRICTED TO EDITORIAL USE - NO MOBILE PUSH ALERTS/DOWNLOADS        (Photo credit should read OZAN KOSE/AFP/Getty Images)

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Serbia's forward Aleksandar Mitrovic (2nd R) is congratulated by teammates after scoring during their Russia 2018 World Cup Group E football match between Serbia and Switzerland at the Kaliningrad Stadium in Kaliningrad on June 22, 2018. (Photo by Attila KISBENEDEK / AFP) / RESTRICTED TO EDITORIAL USE - NO MOBILE PUSH ALERTS/DOWNLOADS (Photo credit should read ATTILA KISBENEDEK/AFP/Getty Images)

Serbia's forward Aleksandar Mitrovic (2nd R) is congratulated by teammates after scoring during their Russia 2018 World Cup Group E football match between Serbia and Switzerland at the Kaliningrad Stadium in Kaliningrad on June 22, 2018. (Photo by Attila KISBENEDEK / AFP) / RESTRICTED TO EDITORIAL USE - NO MOBILE PUSH ALERTS/DOWNLOADS        (Photo credit should read ATTILA KISBENEDEK/AFP/Getty Images)