[MONEY MATTERS] For the sixth consecutive year, Manchester United is the world's most valuable club in the rankings by Forbes magazine, though its worth fell to $1.8 billion, down 2 percent from the previous year.

Forbes also estimated that Manchester United, whose American owners, the Glazer family, have been at odds with United fans, was the most profitable club last year with $150 million in operating income.

The average worth of the clubs in the Forbes Top 20 fell 8.5 percent from last year.

The Top 10 consisted of four English teams, three from Italy, two from Spain and one from Germany.

1. Manchester United: $1.8 billion
2. Real Madrid: $1.3 billion
3. Arsenal: $1.1 billion
4. Barcelona: $1 billion
5. Bayern Munich: $990 million
6. Liverpool: $822 million
7. AC Milan: $800 million
8. Juventus: $656 million
9. Chelsea: $646 million
10. Inter Milan: $413 million