Portugal winger Cristiano Ronaldo limped out of training on Wednesday, raising concerns about his chances of making further appearances for his side.
Portugal face Jurgen Klinsmann’s USA in their penultimate Group G game, after losing to Germany 4-0 last Monday.
The Real Madrid forward left the field early with an ice pack strapped to his left knee.
Ronaldo, 29, has suffered from knee and thigh injuries since the end of the domestic season.
He declared himself 100% fit to play prior to the opening group game loss to Germany at the Arena Fonte Nova in Salvador.
Second-choice goalkeeper Beto believes the reigning World Player of the Year will be ready to face the USA at the Arena Amazonia in Manaus.
“Cristiano is 100% fit to play,” he said. “Every match, if he starts to play, it is because he is fit to play, he’s ready to play.”
