Moscow (AFP) - Portugal left-back Raphael Guerreiro looks set to miss the rest of the Confederations Cup with an ankle injury as confusion reigned on Thursday after he initially said he had a fracture.

The Borussia Dortmund defender had to be helped off in the second half of Wednesday's 1-0 win over Russia in Moscow after Cristiano Ronaldo had headed the winner from Guerreiro's cross.

On his official Instagram account on Thursday, Guerreiro stated he had suffered a fracture but that it was an old injury received months ago, before the post was later deleted.

"Thank you for your messages, I have a fracture, but it happened three months ago," Guerreiro posted in both Portuguese and French before the message was withdrawn.

"Fortunately, the fracture is not causing me any pain, but I can't put my foot on the ground or move.

"I'll be behind my team-mates for the rest of the competition."

His club then released a statement saying Guerreiro only had "deep bruising on his foot", reportedly on the area where he suffered a hairline fracture weeks ago.

Ronaldo's eighth-minute header gave the European champions their first Confed Cup win and a victory over New Zealand on Saturday would secure a semi-final spot.