Argentina have World Cup qualifiers with Paraguay and Peru next month but Aguero has been ruled out for just under a month.
The news will irk City, though Argentina may understandably wish to verify whether the player can at least play some part in their crucial qualifiers.
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Summer 2016 is set to be a very exciting time for football fans, as this is when the long awaited Euro 2016 tournament kicks off.
Since Guus Hiddink arrived at the helm, Chelsea have improved considerably after a tricky start to the campaign.