UEFA Euro 2004 was a football tournament that took place in Portugal between 12 June and 4 July 2004. The 16 teams that qualified for the competition were required to submit a final 23-man squad by 2 June 2004, although injured squad members could be replaced at any time up to 24 hours before their team's first match. The players' ages, clubs and caps are accurate as of the start of the tournament's opening day.