Twitteuro is an experimental project that was developed to monitor in real-time the popularity and trends of the Euro 2012 teams and players during the matches. It used the Twitter streaming API to collect all the tweets with the #Euro2012 hashtag and applied information extraction techniques to identify mentions to all the teams and individual players, which we use as a measure of popularity. Twitteuro provides interactive visualizations that let you explore and compare the popularity of teams and players during the matches and throughout the tournament. You can also analyse the Twittersphere reaction to match events in the trendline visualization. For more information about Twitteuro go to about.