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.
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 -- which would require treatment over a three-month period.
The former Manchester City forward has since been subjected to regular cardiac exams to monitor his health, with the results advising him it would be a risk to carry on with his professional career.