Manchester City legend Sergio Aguero was admitted to hospital on Saturday for a cardiac exam after being substituted with 'chest discomfort' while playing for Barcelona.
Aguero, who left City in the summer after a sensational 10 seasons, was making his first start at the Nou Camp for Barcelona after struggling with injury at the start of his time in Spain.
However, as he jumped for a header, Aguero stayed down during the draw with Alaves and was treated on the pitch for a short period.
He was able to walk off with the assistance of Barcelona's medical staff, but clearly looked in some discomfort and was seen holding his chest.
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