Greatest ever 10 club teams:
Best 10 club teams in history of Football:

Milan 1989-1990
Ajax 1995
Barcelona 2009
Manchester United 1999
Arsenal 2004
Manchester United 2008
Real Madrid 1956-1960
Ajax 1971-1973
Liverpool 1977-1978
Santos 1962-1963
River Plate 1940's
Inter 1964-1965
Manchester United 1968
Real Madrid 2002
Bayern Munich 2001
Milan 1994
Juventus 1996
Celtic 1967
Juventus 1985
Nottingham Forest 1979-1980
Bayern Munich 1974-1976
Dortmund 1997
Dynamo kyiv 1986
Benfica 1961-1962
Manchester United 1958