Greece midfielder Giorgos Karagounis has said that he and his teammates must treat each game like a cup final at Euro 2012.
Karagounis, who was a central figure in the Greek side that won Euro 2004, admits that the one-time winners cannot afford to make a single mistake since there are so few games.
"In such a tournament, each game is a final," he said. "Since there are so few games, no mistakes are allowed.
"We know the capabilities of this team, I hope that we will demonstrate our potentials tomorrow on the pitch.
"We want to give as much happiness to Greek people as possible."
Greece kick off Euro 2012 against co-hosts Poland this afternoon.
