Soccer is a team sport played by two teams of eleven players. The aim of the game is to score a goal with the ball in the opponent's goal. The soccer ball and its quality are of huge importance and can seriously affect the game. Football is the most famous sport in the world and the best players in this sport are very highly paid and respected all over the world. Players in football are divided into different types, according to the position they occupy. Each team has one goalkeeper who stands and guards the goal, and only he has the right to play with his hands. The remaining players are divided into defenders, midfielders and forwards. They try to pass the ball to each other with their feet and direct it into the opponent's goal. Modern football has its origins in England, where in 1863, after the establishment of the Football Association, the first rules of the game were approved. The most prestigious international competition is the World Championship, held once every four years. Similar ball games were played since ancient times in the stadiums of ancient Thrace, China and Egypt. Such ancient sports are still played in some countries, such as kemari in Japan.