Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Aleksandar Koci (Serbian Cyrillic: A e ca ap Ko ;born March 18, 1969 in Vlasotince, SR Serbia, SFR Yugoslavia), is a Serbian former football goalkeeper. He played in many teams such as Vlasina Vlasotince, FK Dubo ica, FK Vojvodina, Levante UD, AC Perugia , Empoli F.C., Red Star Belgrade and Ethnikos Achnas. Association football, 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.