A statement on the Brazil Football Federation website said, "He woke with a fever and is receiving medication."
World Cup holders Brazil are in the process of getting ready for their
opening match of the tournament against Croatia on 13 June but their
star player Ronaldo's season has been spoiled by problems.
Ronaldo, who was the top scorer at the 2002 finals, with eight goals,
missed the end of the Spanish domestic season due to an injury at the
time.
Earlier on this season Ronaldo scored five goals in Brazil's three
warm-up matches since they arrived in Europe on 22 May, against
Fluminense's Under-20 squad, Swiss side FC Lucerne and against New
Zealand, which shows that he had the ability to have played well in the
World Cup had he not gone down with illness.
