Italy defenseman Giorgio Chiellini is coming into his prime just at the right time and this may be his tournament. He plays in Italy for Juventus and knows the Italian defensive game inside out.
Holger Badstuber, Germany
Holger Badstuber has been described as the best left footed defender in Germany. He is fairly new to the German set up, but he still has plenty of experience for a 23-year-old. He is in great form going into the competition.
Mats Hummels, Germany
Germany's Mats Hummels is an imposing figure at over 6ft 3ins tall. He will need to re-live his Dortmund form if he is to help Germany win Euro 2012.
Michal Kadlec, Czech Republic
Czech Republic's national soccer team defender Michal Kadlec is one of the more unknown defenders to watch. He plays for Leverkusen one of the top sides in Germany and has been one of their best players in recent years. This tournament will provide him with a stage to get his name recognized.
Gerard Pique, Spain
Spain's Gerard Pique has blossomed since his departure from Manchester United. He returned home to Barcelona and has become one of the best central defenders in the world.
Sergio Ramos, Spain
Spain's Sergio Ramos is regarded by many as one of the best defenders in world soccer. He will have to be on his game if Spain are to repeat thier 2008 triumph.
Daniel Agger, Denmark
Denmark's Daniel Agger has been outstanding alongside Martin Skrtel at the heart of Liverpool's defense this season. He has been one of the success stories of Liverpool's season. If he can perform then Denmark will be a tough nut to crack.
Gregory van der Wiel, Netherlands
Netherlands' Gregory van der Wiel only established himself in the Dutch set-up a couple of years back. He has already managed 25 caps and that is set to continue well into Euro 2012 and beyond.
Philipp Lahm, Germany
Germany's Philipp Lahm is always in good form when these international tournaments come around. The very attacking fullback will be in the mood and may be the driving force behind a German Euro victory.
England player John Terry has been a huge figure in the dressing room for the last ten years. This tournament may well be his last and he has a lot to prove to his doubters.