Sokratis Papastathopoulos is confident Greece's ability to win when it matters will help them stun Russia in Saturday night's do-or-die European Championship clash in Warsaw.

Papastathopoulos, who returns after missing Tuesday's 2-1 Group A defeat to Czech Republic following his red card against Poland, knows nothing more than victory will do if the surprise 2004 champions are to avoid another early tournament exit.

"We tend to prevail in the key matches, so that is what we all hope happens," Papastathopoulos said. "What's important to concentrate on is that we need just one win to make it through."

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