Group A
Poland
Greece
Russia
Czech Republic
POLAND
HOW DO THEY PLAY?
The vastly experienced Franciszek Smuda has been happy to look beyond the Ekstraklasa to compose his squad. Including players with Polish roots reared in France and Germany allows the coach to engineer a more high-energy approach, which has surprised opponents including Argentina and Germany in recent friendlies. The midfield is generally built to contain. Ahead of it, Borussia Dortmund striker Robert Lewandowski provides options; he can hold the ball up to relieve pressure, drop deep to receive and even get in behind defences.
Likely formation: 4-2-3-1
Possible starting XI: Wojciech Szczesny; Lukasz Piszczek, Damien Perquis, Marcin Wasilewski, Jakub Wawrzyniak; Dariusz Dudka, Adrian Mierzejewski; Jakub Blaszczykowski, Eugen Polanski, Ludovic Obraniak; Robert Lewandowski.
STAR MAN
Poland's outstanding player and biggest goal threat, Robert Lewandowski (pictured right) arrives at Euro 2012 in the form of his life.
He was voted the Bundesliga's Player of the Year for 2011-12 after firing Borussia Dortmund to the domestic double. His hat-trick against Bayern Munich in the German Cup final took his tally to 30 goals in all competitions (plus eight assists).
His form and fitness are absolutely critical to Poland's chances - they have no other forward in his class.
Lewandowski, who usually plays as a lone striker for club and country, was given his international debut in a World Cup qualifier in 2008, and took just nine minutes to get on the scoresheet.
The 23-year-old comes from a sporting family: his father was a national judo champion, his mother and sister played volleyball, while his fiancée is a traditional karate fighter who has won medals at world and European level.
ONE TO WATCH
A late call-up for Euro 2008 as a replacement for the injured Jakub Blaszczykowski, four years on Lukasz Piszczek is very much a key man for both club and country. Originally a right-winger or striker, his career has taken off since switching to right-back during the 2009-10 season.
Piszczek has missed just three league games in two seasons since moving to Borussia Dortmund, winning back-to-back Bundesliga titles.
GREECE
HOW DO THEY PLAY?
Former Greece midfielder Stelios Giannakopoulos: "The Portuguese coach Fernando Santos has his own mentality, and he has changed the style a little bit. It is a more controlled team, a team that tries to build from the back. It's different from Otto Rehhagel because he wanted more direct football.
"We don't have the big stars, but we have Georgios Samaras, Giorgos Karagounis and Kostas Katsouranis, who have played in the Euros before especially at 2004. The team is not based on the players, it is based on the team spirit and if someone tries to play for themselves, everybody loses and nobody wins."
Likely formation: 4-5-1/4-3-3
Possible starting XI: Kostas Chalkias; Sokratis Papastathopoulos, Avraam Papadopoulos, Kyriakos Papadopoulos, Jose Holebas; Kostas Katsouranis, Giannis Maniatis, Giorgos Karagounis; Sotiris Ninis, Fanis Gekas, Georgios Samaras.
STAR MAN
Greece are hardly well endowed with attacking midfielders, so the serious knee injury Sotiris Ninis (pictured right) suffered in September 2011 was a real blow. The Panathinaikos playmaker damaged cruciate ligaments moments after scoring a spectacular solo goal against Israel.
However, Ninis' absence did not prevent the Greeks clinching qualification with victory against Group F favourites Croatia. The 22-year-old made his return in March, and has since signed a deal to play for Parma next season.
Born in Albania to Greek parents, Ninis was selected for the 2010 World Cup but veteran coach Otto Rehhagel appeared reluctant to trust the youngster. The midfielder made two substitute appearances in South Africa, spending a total of 41 minutes on the pitch.
He was eventually promoted to the starting line-up by new manager Fernando Santos after Greece drew their opening two Euro 2012 qualifiers. The move immediately paid off, his selection coinciding with a run of five successive wins.
ONE TO WATCH
Greece's success under Rehhagel was based around a rock solid defence, and they remain pretty miserly under his successor, conceding just five times in qualifying. A baby-faced but athletic centre-back, Kyriakos Papadopoulos was not used in the first half of the campaign but the Schalke youngster started four of the final five qualifiers, impressing observers with his maturity.
The 20-year-old, who can also play as a holding midfielder, was watched by a number of top European clubs, including Manchester United, before eventually joining Schalke in 2010.
Papadopoulos had not scored a club goal prior to this season, but he ended the campaign with five in all competitions. He has also provided an attacking threat in his brief international career - he netted twice in qualifying, including a goal against Malta 26 minutes into his debut.
RUSSIA
HOW DO THEY PLAY?
Dick Advocaat has not been overly experimental with his sides up until now, so it is likely that he will stick to the well-known players. Russia will probably set up with Aleksandr Kerzhakov up front, supported by Andrey Arshavin and Alan Dzagoev, while utilising Yuri Zhirkov's attacking runs on the flank.
Russia would also hope to use set-pieces, with Sergei Ignashevich and Arshavin both capable of scoring from free-kicks. As for plan B, Advocaat can call upon Pavel Pogrebnyak, Artyom Dzyuba or Roman Pavlyuchenko and switch to 4-4-2, with Aleksandr Kerzhakov supporting one of the tall forwards with crosses into the penalty area.
Likely formation: 4-3-2-1
Possible starting XI: Igor Akinfeev, Aleksandr Anyukov, Vasili Berezutski, Sergei Ignashevich, Yuri Zhirkov, Roman Shirokov, Konstantin Zyryanov, Igor Denisov, Alan Dzagoev, Andrey Arshavin, Aleksandr Kerzhakov.
STAR MAN
CSKA Moscow's Alan Dzagoev (pictured right) was named the Best Young Player in the Russian Premier League following a successful debut season with them in 2008-2009. The 21-year-old attacking midfielder from North Ossetia has already scored 25 league goals for them in fewer than 100 games, and scored four goals for his national side in the eight qualifying matches he played as Russia finished top of group B.
ONE TO WATCH
Andrey Arshavin left Arsenal during the January transfer window after a frustrating few years in the Premier League. Glimpses of quality - his four-goal haul at Anfield in 2009, a sublime winner against Barcelona in 2011 - were almost forgotten after a poor season this year. Now back in Russia with Zenit, Arshavin has the potential to light up the tournament in the same way he did four years ago.
CZECH REPUBLIC
HOW DO THEY PLAY?
A lack of width at the start of the qualifying campaign encouraged coach Michal Bilek to switch his formation, with Tomas Rosicky now playing centrally behind a lone striker Tomas Pekhart or Milan Baros. The performances of deep-lying midfielder Jaroslav Plasil have been key to their progress, giving the Czechs more creativity, while wide forwards Jan Rezek and Vaclav Pilar are supported by offensive-thinking full-backs Theodor Gebre Selassie and Michal Kadlec. A largely organised side that likes to break on the counter-attack, captain Petr Cech says their strength is their adaptability.
Likely formation: 4-2-3-1
Possible starting XI: Petr Cech; Theodor Gebre Selassie, Tomas Sivok, Roman Hubnik, Michal Kadlec; Jaroslav Plasil, Petr Jiracek; Jan Rezek, Tomas Rosicky, Vaclav Pilar; Tomas Pekhart.
STAR MAN
Household names in the Czech squad are few and far between, but Chelsea goalkeeper Petr Cech (pictured right) needs no introduction. The 29-year-old kept clean sheets in both play-off matches against Montenegro, making several important saves in the second-leg victory in Podgorica.
Cech, who is set to take part in his fourth major international tournament, will be keen to erase memories of his costly error against Turkey at Euro 2008. The Czechs were heading for the quarter-finals until Cech fumbled a routine cross in the 87th minute, allowing Nihat Kahveci to equalise. Moments later Cech was again beaten by Nihat, sending the Czechs out.
ONE TO WATCH
Bayer Leverkusen left-back Michal Kadlec was top scorer in qualifying with four goals, although three of them came from penalties.
He held his nerve to convert the crucial late spot-kick against Scotland, which was controversially awarded after team-mate Jan Rezek appeared to dive .
Kadlec made an inauspicious start to his international career, scoring an own goal on debut in a Euro 2008 qualifier against neighbours Slovakia, but has nonetheless established himself as a regular starter.