Injuries may force Poland coach Franciszek Smuda to reshuffle his lineup for the Euro 2012 co-host's final group match, a must-win game against the Czech Republic on Saturday.
Smuda said Friday that he'd like to start with the same side that drew with Russia on Tuesday, but that "injuries may affect that."
Defender Damien Perquis, along with midfielders Dariusz Dudka and Eugen Polanski, picked up injuries against the Russians. Perquis has a deep cut to his shin and Polanski sustained a deep bruise to his knee, while Dudka aggravated an abdominal strain.
Dudka and Polanski trained with the team on Friday, while Perquis did individual exercises.
Poland must beat the Czech Republic on Saturday in Wroclaw to advance to the quarterfinals. A defeat would see the Czechs go through.
"We know in our heads that we have to win, that from the very start we have to, excuse me, go kick ass — that's how it is," Polanski said. "I think that if we show the sort of play that we did against Russia that we won't have any problem."
The Poles were eliminated in the group stage in their European Championship debut in 2008, and haven't advanced to the knockout stage of a major tournament since the 1986 World Cup.
Smuda's players are under no illusions of just how important Saturday's match is for them — and for 40 million Polish fans.
"We know that it's an important, historic match," Polanski said. "With a win we can give the fans and the country a lot."
Smuda, who called the match "probably the most important" of his life, must also decide who to start in goal.
First-choice 'keeper Wojciech Szczesny, who plays for Arsenal, was sent off in Poland's opener against Greece. Przemyslaw Tyton came on and saved the ensuing penalty to salvage a 1-1 draw.
Tyton then played well against Russia in another 1-1 draw, making several solid saves against a powerful Russia attack.
Smuda, however, refused to say who would get the start against the Czechs, saying that "we'll decide tomorrow who will be in goal for the match."