The first quarter-finalists of Euro 2012 will be known by the end of the night, and Poland will have to win a match for the first time in the European Championships if they are to reach the last eight. This task is by no means unachievable. Although their Czech opponents showed vast signs of improvement in their latest fixture, the goal they handed Greece is a reminder that their defence is still error prone. On the aforementioned occasion, Petr Cech allowed the ball to slip through his fingers leaving Greece's Theofanis Gekas a simple tap-in. It is vital they avoid this kind of defensive error this afternoon.