CAMPINAS, Brazil — Cristiano Ronaldo is fully fit to play against the United States in their crucial Group G match at the World Cup, a Portugal teammate said Wednesday.

Ronaldo needed an ice pack for his troublesome left knee during the day’s earlier training session, once again raising concerns about the world player of the year’s fitness.

But backup goalkeeper Beto said the Real Madrid star would be ready for the showdown with the United States on Sunday in the Amazon rain forest capital of Manaus.

“Cristiano is 100 percent fit to play. Every match, if he starts to play, it is because he is fit to play, he’s ready to play,” Beto insisted. “He loves football but his body is the most important thing for him … so if he starts a match he is ready, he is fit, so I don’t think that is a problem.”