Barcelona striker Sergio Aguero has announced his retirement from football at the age of 33 due to a heart condition.
Aguero has not played since the end of October, when he was taken off during the first half of Barca's draw with Alaves after experiencing chest pain.
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Barcelona later announced that the discomfort had been caused by an arrhythmia -- a broad term to describe any heart rhythm that is not completely normal -- that would require treatment over a three-month period.