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Liverpool goalkeeper Alisson pictured in action for Brazil.
Liverpool have released a statement which read: "Alisson Becker has departed the Brazil national team set-up and he will return to Liverpool.
"The goalkeeper was forced off in the second half of his nation's World Cup qualifier against Colombia in the early hours of Friday following a collision.
He will undergo assessment from the Reds' medical staff."
Brazil's team doctor Rodrigo Lasmar provided a full update on Alisson's condition after the Liverpool goalkeeper was substituted in the win over Colombia.
Lasmar confirmed that Alisson had suffered a head injury, with further tests needing to be carried out.
"Alisson suffered a trauma to the head region, he was replaced by a suspected concussion," said Lasmar - via CNN Brazil.
"Now we will do all the CBF protocol, it will undergo recommended imaging tests, a computed tomography, then a resonance with diffusion.
"If all the tests are normal, we will follow up and do a cognitive test.
Today, we will do the tests, all the necessary evaluations.
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"Alisson is [feeling] normal, with no complaints.