Speculation over tensions within the Portugal camp intensified after Cristiano Ronaldo's sister liked an Instagram post criticising Bruno Fernandes following the team's disappointing 1-1 draw against DR Congo in Houston on Wednesday.
Portugal entered the FIFA World Cup 2026 as one of the favourites for the title, but the former European champions stumbled in their opening Group K fixture.
Joao Neves had given Roberto Martinez's side the lead with a well-taken header, but DR Congo seized control soon after and levelled through Yoane Wissa just before half-time.
Despite dominating possession for large periods, Portugal struggled to break down Congo's disciplined defensive structure.
The performance drew widespread criticism, with Ronaldo once again facing scrutiny over his place in the starting XI.
The 41-year-old, appearing at a record sixth World Cup, has now gone 10 consecutive matches at major tournaments without scoring.
Fernandes also came under fire after creating just one chance during the match.
The debate escalated when Ronaldo's elder sister, Katia Aveiro, appeared to endorse criticism of Fernandes by liking an Instagram post from a Brazilian football page.
The post accused the Manchester United midfielder of failing to replicate his club form for Portugal and compared him to Barcelona winger Raphinha, who has faced similar criticism for his performances with Brazil.
This is not the first time rumours of friction between Ronaldo and Fernandes have surfaced.