The UEFA European Under-17 Championship consists of three distinct stages: the qualifying round, the elite round and the final tournament. The format changed for 2014/15 with the expansion of the final tournament from eight to 16 teams.
The qualifying round, played in autumn, is made up of 13 groups of four countries playing in one-venue mini-tournaments. The top two from each pool progress alongside the four third-placed sides with the best record against the leading pair in their groups.
In the elite round, held in early spring, those 30 qualifiers plus the top two seeds – given a bye this far – compete in eight mini-tournament groups of four. The group winners and seven runners-up with the best record against the teams first and third in their section advance to the finals to join the hosts.
In the final tournament the contenders are split into four groups of four, with the front two from each proceeding to the knockout phase.
Further details, including the criteria for separating sides that finish level on points in a group, or after 80 minutes in a match, can be found in the official competition regulations.
Moise Kean joined the short list of players to have appeared in a UEFA European Under-17 Championship finals and the UEFA Champions League in the same season when he started Italy's opener against Croatia on Wednesday.
In November, the Juventus forward had become the first footballer born this millennium to feature in Europe's top club competition. His cameo away to Sevilla on matchday five came three days after his senior debut for the Bianconeri, as a late substitute at home to Pescara in Serie A.
Kean, who announced himself on the Group A scene by scoring the Italian winner versus Croatia two minutes from time in Rijeka, was also involved in his country's 2016 U17 EURO finals campaign in Azerbaijan.
UEFA Champions League and U17 EURO in the same season
2016/17: Moise Kean (Juventus & Italy)
22 November: Sevilla 1-3 Juventus (six minutes)
3 May: Croatia 0-1 Italy (80 minutes, one goal)
2012/13: Alen Halilović (Dinamo Zagreb & Croatia)
24 October: Dinamo 0-2 Paris (one minute)
6 November: Paris 4-0 Dinamo (four minutes)
21 November: Porto 3-0 Dinamo (six minutes)
5 May: Croatia 0-0 Italy (80 minutes)
8 May: Russia 0-0 Croatia (80 minutes)
11 May: Ukraine 1-2 Croatia (80 minutes, one goal)
2010/11: Kenneth Zohore (København & Denmark)
20 October: Barcelona 2-0 København (16 minutes)
24 November: Rubin 1-0 København (17 minutes)
7 December: København 3-1 Panathinaikos (three minutes)
22 February: København 0-2 Chelsea (three minutes)
16 March: Chelsea 0-0 København (29 minutes)
3 May: Serbia 2-3 Denmark (80 minutes)
6 May: Denmark 2-0 England (70 minutes, one goal)
9 May: Denmark 1-0 France (13 minutes)
12 May: Denmark 0-2 Germany (80 minutes)
2008/09: Jack Wilshere (Arsenal & England)
25 November: Arsenal 1-0 Dynamo Kyiv (13 minutes)
10 December: Porto 2-0 Arsenal (31 minutes)
6 May: England 1-1 Netherlands (80 minutes)
9 May: Germany 4-0 England (68 minutes)
The UEFA Champions League's youngest players
Céléstine Babayaro, Anderlecht: 16 years and 87 days (1994)
Alen Halilović, Dinamo Zagreb: 16 years and 128 days (2012)
Youri Tielemans, Anderlecht: 16 years and 148 days (2013)
Charis Mavrais, Panathinaikos: 16 years and 242 days (2010)
Kenneth Zohore, København: 16 years and 263 days (2010)
Moise Kean, Juventus: 16 years and 267 days (2016)
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