Kees Cornelis Henricus de Boer (born 13 May 2000) is a Dutch footballer who plays as a midfielder for ADO Den Haag in the Dutch Eredivisie. Besides the Netherlands, he has played in Wales.
Albania
Algeria
Argentina
Australia
Azerbaijan
Belgium
Bolivia
Colombia
Costa Rica
Croatia
Cyprus
Egypt
El Salvador
England
France
Germany
Ghana
Gibraltar
Greece
Guatemala
Honduras
Hong Kong
India
Indonesia
Iran
Iraq
Israel
Italy
Jamaica
Jordan
Kenya
Malta
Mexico
Morocco
Netherlands
Nigeria
Northern Ireland
Peru
Portugal
Romania
San Marino
Scotland
Serbia
South Africa
Spain
Tanzania
Thailand
Tunisia
Turkey
Wales
Fiorentina 
Udinese 
Benfica 
Estoril 
Inter 
Como 
Manchester City 
Everton 
Chelsea 
Fulham 
Nottingham Forest 
Tottenham 
Celtic 
Motherwell 
Wolverhampton 
Manchester Utd 
ST Mirren 
Rangers 
Sampdoria 
Carrarese 
Liverpool 
Leicester 
Arsenal 
Ipswich 
Cagliari 
Lazio 
Atalanta 
FC Porto 
Boavista 
Torino 
Napoli 
Venezia 
ST Johnstone 
Juventus 
West Ham 
Pisa 
AC Milan 
Roma 
Sporting CP 
Newcastle 
Brentford