Fernando Santos' men now have an uphill task to qualify for the next stage of the tournament as they fell victims to two defensive mistakes in the early minutes of the game
Czech Republic put Greece on the brink of elimination from Group A of Euro 2012 after a 2-1 victory over the Ethniki at the Municipal Stadium in Wroclaw.
Michal Bilek's men hit the Galanolefki with a first-half double through Petr Jiracek and Vaclav Pilar, and it looked as though the Narodak had done enough to emerge winners.
After the break, however, a howler from Petr Cech allowed Theofanis Gekas to claw one back and set up a tense finish. But the Czechs hung on and claimed an important victory in their quest for a place in the quarter-finals.
The game got off to the worst possible start for Greece after conceding two goals in less than six minutes. The makeshift defensive pairing of Kyriakos Papadopoulos and Kostas Katsouranis was struggling right from the off, and the Czech Republic pounced with venom.
First, Tomas Hubschman exploited the space between the two central defenders to pick out Jiracek just outside the box, and the Wolfsburg midfielder slotted home easily under little pressure from the Greek rear guard.
Then, three minutes later, Theodor Gebre Selassie showed Jose Holebas a clean set of heels on the right wing before whipping in a cross, which was rather fortunately met by the feet of Pilar, who netted his second goal in as many matches.
Greece managed to shake off the early shock, but were soon dealt yet another blow as first-choice goalkeeper Kostas Chalkias picked up an injury and had to be replaced by Michalis Sifakis. Still, with the Czechs taking their foot off the gas, Fernando Santos' men began to gather momentum.
In the 40th minute, Greece had the ball in the net as Giorgos Fotakis finished past Cech with a skilful header, following a cross from the right flank by Vasilis Torosidis, but the assistant referee deemed it as offside.
The pressure continued after the break as Bilek's men were dominating the proceedings, allowing Greece chances only on the break. Out of nowhere, however, the Ethniki managed to score following a horrible error by Cech.
A stray cross by Georgios Samaras was inexplicably dropped by the goalkeeper straight into the path of Gekas, who had no trouble converting with the open goal at his mercy, halving Greece's deficit and giving them a way back in the game.
The goal gave Fernando Santos' men some much-needed momentum and the Czechs soon found themselves pinned back in their own half. Greece bombarded the penalty area with crosses, but Bilek's players were doing their best to hold onto their lead.
The Ethniki threw everything forward in the final minutes of the game, but were ultimately denied an equaliser by their resilient opponents, who claimed a crucial victory in their battle for a place in the quarter-finals of Euro 2012.