Cristiano Ronaldo's sister has taken to social media to blast Fernando Santos' decision to bench her brother in Portugal's stunning 6-1 win over Switzerland on Tuesday evening. 

Elma Aveiro hit out at the Portuguese manager, claiming that he was 'humiliating' her brother, adding she did not know why Santos had left the 37-year-old out of his starting XI, and that she could not understand it. 

Portugal seemed not to need the five-time Ballon d'Or winner, as they went on to thrash Switzerland, with Goncalo Ramos starring up front in a three-goal performance that has drawn widespread praise. 

Aveiro took to Instagram to share her tirade at the decision to leave out her brother, who started from the bench in a knockout game of a major international tournament for the first time since Euro 2008.

'Today we are all together, if you think it has to be like this I am here to see it,' she began, posting an image of the Portugal team prior to kick-off.