How will the tournament work? 

The tournament will consist of 24 teams, which have been divided into six groups of four. 

Both the winner and the runner-up of each group will progress to the round of 16, as will the four-best third-placed teams.  

Should any nations finish on the same points come the end of the group stage, their position will be determined first by the number of points obtained in the matches between the teams in question, before goal difference and away goals scored in those specific games. 

The four-best third-placed teams will be determined by the total number of points obtained across their group, before goal difference and goals scored come into play.