"Right now I have a contract with Real Madrid and I'm only thinking about the World Cup but without a doubt the American market is one of my goals for the future Ronaldo said while working out for the World Cup.
Ronaldo reportedly recently turned down a $120 million 10-year offer to play for the New York Red Bulls in Major League Soccer.
"A transfer to the United States right now would not make sense Ronaldo's manager Fabiano Farah said. "He still has several challenges in European soccer."
The 29-year-old Ronaldo and defending champion Brazil will open World Cup play Germany against Croatia on June 13.