Ronaldo has started just one league match this term under Erik ten Hag at Manchester United, but was on the teamsheet for both of Portugal's Nations League games during the current international break.
His place in the national team is now being questioned, though, as he failed to score in either match and missed a number of chances in defeat against Spain on Tuesday.
Former Italy star Antonio Cassano said, ''At this point, Cristiano should do himself a favour and understand that if you don't reach a certain level, you should close the shop.
"He won everything, he was a phenomenon.
"Stop! You have to stop or you'll only run into the bench."