The Czechs started the day looking like they would need just a point to reach the last eight, but as Greece took the lead against Russia on the stroke of half-time it meant that victory over Poland became imperative.
It was an excellent performance from the Czechs - the first 20 minutes aside - they knew the Polish would tire and took full advantage in the second half.
Petr Cech was very composed and exuded confidence in opening exchanges, despite the howler from the Greece game just days earlier. The Czech Republic are really starting to grow into the tournament and ran out deserved group winners in the end.
"We started badly and let the occasion get to us a little bit," the Chelsea shot-stopper told reporters after the game. "The home side capitalised on our mistakes.
"But with time we got better. We created chances and then scored a deserved goal.
"We knew the result [of Greece v Russia]. They told us and we could see it on a screen, but we focused on ourselves, decided not to wait for miracles and to score ourselves instead."
The Czechs ultimately ended up topping Group A, meaning they progressed to the next round alongside second-placed Greece.
They will meet the runners-up from Group B - which is still undecided ahead of the final matchday - in the quarter-finals.