Association football, or soccer, is the most popular sport in the world. It is estimated that more than half of the world’s population consider themselves to be association football (soccer) fans. The sport enjoys an estimated 4.0 billion person following, and a global sphere of influence. Ancient soccer has been traced to China, as early as the 2nd Century. The Romans, Greeks, and Japanese have also been thought as possible first players of the sport. Contemporary soccer began in England, where it amassed considerable interest and spread to other parts of the world. The sport is more popular in Europe and Americas than in any other continent. The sport is characterized by two teams of eleven player and two goals. The objective of the sport is to drive a ball into the goal defended by the opponent team.