Before matches, teams must complete the match sheet with the numbers, first names, surnames, dates of birth and, if applicable, shirt names of the 23 players in the squad, together with the first names, surnames and functions of the officials sitting on or next to the substitutes’ bench. The goalkeepers and team captains must be identified. Players must wear the shirt and short numbers indicated on the match sheet.
The 11 players indicated on the match sheet as forming the starting 11 must commence the match. The other players are designated as substitutes.
Each team must have its match sheet validated by its competent association official and submit it at least 75 minutes before kick-off.
Up to a maximum of five of the substitutes listed on each team’s match sheet may take part in the match. Exceptionally, a sixth substitute listed on the match sheet may take part exclusively during extra time. Each team may use a maximum of three stoppages in play to make substitutions (one additional stoppage in extra-time can be used). Substitutions made before the start of the match, during half-time, between the end of normal playing time and extra time, and at half-time during extra time do not reduce the number of stoppages in play that can be used. A player who has been substituted may take no further part in the match.
After the validated match sheets have been submitted no changes are allowed. Before the match has kicked off, the following exceptions are possible:
If any player in the starting 11 on the match sheet is physically incapable of starting the match, they may be replaced by one of the substitutes listed. This substitute may then be replaced by a registered player not listed on the match sheet (but included in the list of 23 players as laid down in). The replaced player is taken off the match sheet. The quota of substitutes is not reduced so that during the match, five players may still be substituted.
If any of the substitutes listed on the match sheet is physically incapable of being fielded, they may be replaced by a registered player not listed on the match sheet (but included in the list of 23 players as laid down in).
If none of the goalkeepers listed on the match sheet is physically incapable of being fielded, they may be replaced by goalkeepers not previously listed on the match sheet, subject to final approval by UEFA.
The association concerned must, upon request, provide the UEFA administration with the necessary medical certificates.