"We weren't as good as we thought we were."
Poland captain Tomasz Waldoch apologised to their supporters following the convincing defeat.
"We're sorry to the Polish fans. We lost 4-0 but it shouldn't really have gone that far," he said.
"I thought we did better than when we lost to Korea, but the result is we still lost."
Goalkeeper Jerzy Dudek, who has had a disappointing World Cup after an impressive first season in the Premiership with Liverpool, was less hopeful about the future.
"We didn't manage to make up for all our drawbacks with ambition and will to fight," he said.
"I don't blame my colleagues for the mistakes they made in the defence.
"It is the whole team that wins or loses, not individual players, even if their mistakes were the worst that could be.
"We are defeated as a team. We were too weak. Can this team change? I don't know."