Milan the main man – Czech Republic were solid in a kind qualifying group, finishing second to reigning champions Spain after conceding just eight goals in eight games. The Euro 1996 finalists' problems are in attack, where 30-year-old striker Milan Baros will be expected to provide a cutting edge.
Counting on Karagounis – Greece shocked the whole of Europe eight years ago, emerging from nowhere to be crowned Euro 2004 winners. One of the survivors of that team is midfielder Giorgos Karagounis, whose experience will be key if Greece are to reach the quarterfinals.
Poster boy – Co-hosts Poland boast one of Europe's most in-form strikers in the shape of Robert Lewandoski. The 23-year-old had a fine season with German champions Borussia Dortmund and he will be Poland's main goal threat in Group A.
Kirill the kid – The surprise inclusion in the Russia squad was uncapped CSKA Moscow defender Kirill Nababkin(left). Under Guus Hiddink in 2008, Russia enjoyed a run to the semifinals in Austria and Switzerland. Hiddink's compatriot Dick Advocaat will be hoping for a similar performance this year.
Eyes on Eriksen – The star of the Denmark squad is young playmaker Christian Eriksen. The Ajax midfielder could earn a move to one of Europe's big clubs with an impressive showing in Poland and Ukraine.
Sweating on Schweinsteiger – Germany go into Euro 2012 with a squad full of proven international performers and as one of the favorites to lift the trophy. Coach Joachim Low's main concern will be midfielder Bastian Schweinsteiger, who is battling to be fit for Germany's first match against Portugal on June 9.
Reliant on Robin? – Netherland's Robin van Persie enters the four-yearly tournament off the back of a prolific season with Arsenal. In addition to Van Persie's firepower, the Euro 1988 winners also have Schalke hitman Klaas-Jan Huntelaar.
Cristiano the creator – Portugal have exciting talents such as Real Madrid's Cristiano Ronaldo and Nani of Manchester United in wide positions, but Paulo Bento's team arguably lack a true goalscorer.
Looking to Luka – Croatia impressed many spectators with their performances at Euro 2008, before being eliminated in the quarterfinals by Turkey. Luka Modric was their stand-out performer four years ago, and the pressure will be on the midfelder once again in June.