Sergio Aguero has revealed he doesn't think he will ever be able to sprint again and is now afraid his heart 'doesn't work properly' after he was forced to retire from football.
A tearful Aguero called time on his playing career at the age of 33 in an emotional press conference back in December due to a heart condition.
The former Manchester City striker experienced chest pains and breathing issues during the first half of Barcelona's 1-1 home draw with Alaves on October 30.
He fell to the turf clutching his chest and was treated for several minutes before being able to walk off and taken to hospital.