Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Émerson Luiz Firmino or simply Émerson (born 28 July 1973 in Campinas) is a Brazilian football player who currently plays for MTSV Hohenwestedt in Germany. He also holds German citizenship. Association football, more commonly known as football or soccer, is a sport played between two teams of eleven players with a spherical ball. At the turn of the 21st century, the game was played by over 250 million players in over 200 countries, making it the world's most popular sport.