Di Stefano in critical condition after heart attack

Real Madrid's goalkeeper Iker Casillas (L) listens to Alfredo Di Stefano next to Karim Benzema (2nd L) near Real Madrid coach Carlo Ancelotti (R) before their Spanish First Division soccer match against Osasuna at Santiago Bernabeu stadium in Madrid April 26, 2014. REUTERS/Andrea Comas

MADRID (Reuters) - Real Madrid great Alfredo Di Stefano, 88, is in a critical condition after suffering a heart attack on Saturday, sources from the Spanish capital's emergency services told Reuters.

One of the greatest footballers of all time, Argentina-born Di Stefano was taken to the intensive care unit of Madrid's Gregorio Maranon hospital after an 18-minute respiratory arrest, said the sources who declined to be identified.