Czech Republic coach Michal Bilek hopes that captain Tomas Rosicky will be available for the conclusion of their Group A campaign after limping off during the 2-1 win over Greece in Wroclaw.
The Czechs lost their opening game 4-1 to Russia and knew a another defeat would extinguish their hopes of reaching the quarter-finals.
But they always looked on course to pick up the three points after taking a 2-0 lead inside six minutes thanks to goals from Petr Jiracek and Vaclav Pilar.
Substitute Fanis Gekas got a goal back for Greece after half-time following a terrible error from goalkeeper Petr Cech but the Czechs held out.
But Bilek was left nursing an injury headache after Arsenal midfielder Rosicky was forced off at half-time after picking up an Achilles injury.
And the coach admitted he is a doubt for their final Group A fixture against co-hosts Poland on Saturday.
He said: "With Rosicky it was his Achilles so it was unpleasant for him and we will see tomorrow what the extent of the problem us, but obviously we hope he will be there for the third match in the group as he is an important player.
"We missed him in the second half as he is a key player for us in attack as he can add tempo our game."
But Bilek praised his side for their aggressive start to the match, and the way they kept composure after Cech's error, where the keeper came to collect an overhit pass only to lose control as Tomas Sivok crossed his path, allowing Gekas an easy finish.
He said: "It was a great start and this time we were fortunate enough to score two goals.
"In the first half we were great, our combinations were good, we were dangerous and the goals proved that.
"The second half was complicated because Rosicky could not play on and it took us time to get back in the game.
"We conceded a really bad goal, which gave Greece hope but we didn't allow them any clear chances. We defended well and are very happy that our hopes are still alive.
"The pressure on us was great and we knew if we lost it was the end for us but we showed our strength and we won."
Of Cech's mistake he added: "It was a mistake. Petr didn't communicate with Sivok and it was an unnecessary goal to concede."
Greece coach Fernando Santos, meanwhile, felt his side had paid the price for being unable to field their first-choice centre-halves.
A combination of injury and suspension meant Sokratis Papastathopoulos and Avraam Papadopoulos were both absent, and Santos said the Czechs had taken advantage.
He said: "It was a game which started really badly for us.
"At the start we conceded two goals, although we had been warned that they would start quickly. We knew they would put pressure on us but we failed to respond.
"The Greek defence has only conceded four goals in 10 competitive game and now we have conceded three in just two games.
"Unfortunately the first 10 minutes really cost us.
"It was difficult to come back, we did everything possible to get an equaliser but we didn't make it."
Greece also had a first-half header by Giorgos Fotakis incorrectly ruled out for offside, but Santos did not want to cite that solitary moment as the reason for his side's defeat.
He said: "The truth is from my point of view it was difficult to say if it was offside or not. I wouldn't like to comment on that, but if it was a goal and it didn't count then obviously I think it was wrong."
Santos also confirmed that the injury suffered by goalkeeper Kostas Chalkias during the first half was a minor muscle problem.