Draw procedure
The 23 qualifiers are divided into four pots based on UEFA national coefficients with Spain, as the reigning European champions, assured of a place in Pot 1 having qualified. France are not included in the pots as they are automatically assigned as team A1 so Pot 1 has five teams.
The teams will be drawn into six groups of four teams each (Groups A to F). The draw starts with Pot 1. One ball is drawn and the team is assigned to Group B, position B1; a second ball is drawn and the team is assigned to Group C, position C1; and so on till Group F.
The draw continues with Pot 4. A ball is drawn and the team assigned to Group A. The position of this team within Group A is also determined by draw. A second ball is drawn from Pot 4 and assigned to Group B; again the position within Group B is drawn. The procedure is repeated for all teams in Pot 4.
The draw continues with Pot 3 and concludes with Pot 2. Each time a team is drawn the position within the relevant group is determined by draw. The top two in each plus the four best third-placed sides advance to the knockout phase.
Bron: uefa.com