Jorge Sampaoli, head coach of Argentina's national soccer team, reacts during a training session in Ezeiza, 32km away from Buenos Aires, capital of Argentina, on May 16, 2018. Argentina began on Wednesday its trainings before the start of the Russia 2018 FIFA World Cup. (Xinhua/Martin Zabala)

Players of Argentina's national soccer team take part in a training session in Ezeiza, 32km away from Buenos Aires, capital of Argentina, on May 16, 2018. Argentina began on Wednesday its trainings before the start of the Russia 2018 FIFA World Cup. (Xinhua/Martin Zabala)

Manuel Lanzini (C) and Javier Mascherano (R) of Argentina's national soccer team take part in a training session in Ezeiza, 32km away from Buenos Aires, capital of Argentina, on May 16, 2018. Argentina began on Wednesday its trainings before the start of the Russia 2018 FIFA World Cup. (Xinhua/Martin Zabala)