Ex-footballer Ronaldo has been taken into intensive care in an Ibiza hospital, according to reports.
Ronaldo is believed to have arrived in Ibiza for a summer break a few days ago.
The 41-year-old former Ballon d'Or victor was rushed to hospital after feeling chest pains on Friday in Ibiza and according to local news outlet 'Diario de Ibiza' is now in intensive care.
"Guys, I had a bad case of flu here in Ibiza". Tomorrow I get discharged and I go back home! "Thank you all for the messages and affection!" he tweeted.
The former Barcelona, Real Madrid and Inter Milan player then asked to be transferred to a private hospital later on Friday evening to continue to receive treatment, according to Ibizan daily newspaper Diario de Ibiza.
It quoted hospital sources as stating that Ronaldo was still in intensive care but that he was making good progress.
He scored 62 goals in 98 games for Brazil, as well as being a prolific scorer for some of Europe's elite clubs.
He was instrumental when Brazil won the World Cup in 2002, scoring both goals as they beat Germany 2-0 in the final.
Ronaldo, who retired in 2011 had a glittering football career with top European clubs including Barcelona, Real Madrid and Inter Milan.
He picked up the Ballon d'Or award for the best player in the world in 1997 and 2002.