The Argentine Football Association wrote on Twitter that Aguero "presented symptoms of fainting and for that reason he was taken to have routine studies done as a precautionary measure". Manchester city's forward, Kun Aguero, increased the tally to 2-0 in the 37th minute.
Although the South Americans played without their talismanic Lionel Messi, they had top stars like Sergio kun Aguero, Paulo Dybala, Christian Pavon, Angel Di Maria and Javier Mascherano at the worldwide friendly game with Nigeria.
Argentina shot into the lead courtesy of goals from Ever Banega in the 28th minute and Sergio Aguero moments after.
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A number of users of the app have reported problems with the battery on their device draining whilst using the app. However, while convenient, it did have some drawbacks compared to plugging in an old-fashioned Lighting cable.
But Kelechi Iheanacho inspired Nigeria's fightback.
Iwobi leveled for the Eagles seven minutes after the break before, Idowu put the West Africans ahead two minutes later.
Iwobi then sealed an impressive 4-2 victory for Nigeria, as he nut-megged Javier Mascherano before coolly firing in to the bottom corner in the 73rd minute.
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The game, in preparation for the Russia 2018 World Cup, was played in Krasnodar, Russia.
Argentina manager Jorge Sampaoli confirmed the situation on the federation website, stating: 'Sergio (Aguero) got dizzy and had to leave at half-time'.
We prepared well for this game because playing Argentina is big for us, maybe it is different for them. I know we are capable and have the individual talent to be able to get out of these situations and I'm anxious about what happened tonight.
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Aguero who netted La Albiceleste's second goal in the first half lost consciousness in the middle of the match.