Roberto Martinez confused fans ahead of Portugal vs. Slovenia.

Fans genuinely can’t believe what Roberto Martinez did during Portugal’s national anthem ahead of their last-16 clash against Slovenia.

Portugal are aiming to book their spot in the quarter-finals of Euro 2024.

The Euro 2016 winners are currently facing Slovenia in Frankfurt.

But the tie between Portugal and Slovenia got fans talking before a ball was even kicked.

People on social media couldn’t understand Martinez singing Portugal’s national anthem.

Martinez, a Spanish national, belted out ‘A Portuguesa’ along with the likes of Cristiano Ronaldo before their Euros showdown to the dismay of fans online.

Roberto Martinez confused fans by singing Portugal’s national anthem. Image: Getty

One X user wrote: “Spanish-born Roberto Martinez booming out the Portuguese national anthem there surely the international equivalent of kissing a rival club’s badge.”

A second tweeted: “Did I just see Roberto Martinez of Spain sing the national anthem of Portugal? He had a massive smile on his face while singing! WTF?”

A third added: “Roberto Martinez singing the Portuguese national anthem was very weird.”

A fourth said: “Something weird about Roberto Martinez singing the national anthem of a nation he isn’t from.”

Another questioned: “What’s with Roberto Martinez singing the Portuguese national anthem as a Spanish national.”

Portugal topped Group F, having won two of their three group stage matches. They beat Czech Republic and Turkey before succumbing to Georgia.