A man fell about from the south end of the Amsterdam ArenA 39 minutes into the game between the Dutch champions and the Blaugrana and was immediately rushed to hospital
The club confirmed that a man in row one, block 126 of the Amsterdam ArenA fell five metres in the 39th minute and was immediately rushed to hospital.
"He was taken to hospital with serious injuries," read a message on Ajax's official Twitter feed.
Speculation spead on social media sites that the supporter had died as a result of the injuries but the Amsterdam police force vehemently denied the claims.
"No update about the fan who fell at the ArenA during Ajax-Barcelona," it stated. "Rumours that the fan has passed away are not correct."