Tomas Rosicky faces a race against time to be fit for Czech Republic's final European Championship Group A match against Poland on Saturday evening.
Captain Rosicky sat out yesterday's training session with the Achilles injury that forced him off during Tuesday's 2-1 win over Greece.
The Arsenal midfielder played down fears his absence would have a dramatic impact on his team-mates as they looked for the win or draw what would seal a quarter-final spot.
"What I'm feeling in the team is great hope, a great chance to go to the quarter-finals," Rosicky said.
"Of course, the guys are worried if I play or not.
"But we hope to go through. We've got a great opportunity here and we are aware of it, and we want to grab this chance and go through."
A draw should be enough for the Czechs to progress unless Greece manage to shock Russia in the other final group game.
Head coach Michal Bilek was not afraid for his side to be cast as the villains tonight.
"We want to go to the quarter-final," he said.
"Right now, it's one or the other and we will do our utmost to achieve this goal.
"Of course, we respect our opponent but we are not scared.
"We don't want to say goodbye to the Euros and we want to go through."
Video play: Czech Republic captain Tomas Rosicky almost scores with a rasping drive.
Petr Cech looked to have recovered from ashoulder injury after coming through training unscathed.
Eugen Polanski urged his Polandteam-mates to "do something special" for the country ahead oftonight's night's clash.
Victory would send the Poles through to the lasteight, but any other result would see them crash out of a tournament they areco-hosting along with Ukraine.
Mainz midfielder Polanski, who is an injury doubt aftersuffering a bruised knee, said: "We know that we can do something specialfor our fans and the country.
"This is the most important game in my career.
"This whole tournament is extremely important.
"All the preparation, all the training, fourweeks of preparation, we are here for five weeks in total, and we want todemonstrate that we can give everything.
"If we give 100% of ourselves, we will windefinitely."
Poland boss Franciszek Smuda has doubts over defender DamienPerquis and midfielder Dariusz Dudka.
Smuda's other major selection dilemma revolvesaround whether to recall Wojciech Szczesny in goal or keep faith withPrzemyslaw Tyton, who saved a penalty after Szczesny was sent off againstGreece.
Asked who his goalkeeper would be, Smuda joked:"Definitely not me. Whoever's between the posts.
"We have many question marks. We have someinjuries. Tomorrow, we'll take the final decision."