Johan Cruyff, the 68-year-old Dutch football legend, has been diagnosed with lung cancer.
He is undergoing medical tests at a hospital in Barcelona.
What happened?
Cruyff's management released a statement saying the examinations are still ongoing.
The statement asked for respect for Cruyff's privacy and his family's.
Coaching success
Cruyff is a former coach of Barcelona, guiding the "Dream Team" to the club's first European Cup in 1992.
He won four consecutive Spanish La Liga titles from 1991 to 1994.
Cruyff also won the European Cup Winners' Cup in 1989 and the Spanish Copa del Rey in 1990.
Playing career
Cruyff was a key player for Ajax and the Netherlands, winning three consecutive European Cups with Ajax.
He helped the Netherlands reach the 1974 World Cup final, losing to West Germany.
Cruyff won the Ballon d'Or three times, in 1971, 1973, and 1974.
He was a former smoker and underwent heart surgery in 1991.
Cruyff took part in an anti-smoking advertising campaign after his operation.
Reaction
Barcelona president Josep Maria Bartomeu and vice-president Susana Monje have voiced their support for Cruyff.
Cruyff's influence on the game is still seen today, with his "Total Football" philosophy and the "Cruyff Turn" trick.
He is considered one of the greatest footballers of all time, with a legacy that continues to inspire.
Cruyff's health issues are a concern for the football world, with many fans and players sending their support.
The Dutchman's illustrious career has been marked by numerous achievements, including his three European Cups.
Cruyff's anti-smoking campaign was a notable effort to raise awareness about the dangers of smoking.