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Aguero was treated for several minutes last month against Alaves before being transferred to the hospital
Sergio Aguero, Barcelona's striker, said that he is always positive after reports suggested that he was contemplating retirement.
After suffering chest pains last month against Alaves, the forward for Argentina, 33, was taken by ambulance to hospital.
Barca announced that he would not play for three more months while he is undergoing treatment and his health is being monitored.
Aguero stated on social media that "Given these rumours", he told them that he is following the instructions of club doctors. External-link
"I am currently undergoing tests and treatment. I will be able to see my progress in the next 90 days."
Before joining Barcelona in July, Aguero was Manchester City's all time leading scorer.
He made his debut for Spain last month after a calf injury.
According to Guillem Balague, BBC Radio 5 Live's European football expert, Aguero might have to wait until February/March next year to make a decision about his future.
Balague stated that Aguero signed a two-year contract with Barca in the summer. However, the club has not yet considered cancelling his contract.