Ronaldo scored four goals as he carried Portugal through the group stages, but at the age of 33 his time is running out. By the time of the next World Cup he would be the wrong side of 37.
However, Man City midfielder Bernardo is convinced he still has something offer.
"Ronaldo has had another amazing season," he said.
"He's been the highest scorer in the Champions League and won a third Champions League in a row.
"It's his decision. As a teammate, I hope so because he helps us so much. He's a fantastic player. We don't need to describe him. So hopefully he stays but it's his decision.
"In this World Cup, he helped us so much, scoring four goals. So yes, it seems like he's getting better with age. I hope he stays but we'll see what happens."