The football tournament at the 2000 Summer Olympics started on 15 September. The men's tournament is played by U-23 (under 23 years old) national teams, with up to three over age players allowed per squad. Article 1 of the tournament regulations states: "The Tournaments take place every four years, in conjunction with the Summer Olympic Games. The associations affiliated to FIFA are invited to participate with their men's U-23 and women's representative teams."[1]