Greece midfielder Giorgos Karagounis has insisted that his national side can go all the way and win Euro 2012 after their shock qualification to the quarter-finals.

The 2004 winners knocked out Group A favourites Russia with a 1-0 victory on Saturday, courtesy of Karagounis's strike.

"We don't have to worry about anyone," the Daily Star quotes the 35-year-old as saying. "We have nothing to prove to anyone. We don't fear anyone else.

"This saga is something comparable to what happened in Portugal. We are a new team, a renewed team, and we managed to qualify against everything.

"I can say that we managed to overcome huge obstacles. When we left Greece, we all said in one voice, 'We will give everything'."

Greece will have to beat out Germany for a place in the semi-finals of the competition.