1. Real Madrid Revenue: $746 million
The world's largest and most successful club has continued to expand in recent years, with plans for a theme park in Abu Dhabi the latest eye-catching venture. Denis Doyle/Getty Images
2. Manchester United Revenue: $703 million
Despite a downturn on the pitch, the Premier League club has been boosted off it by dozens of commercial partnerships. ANDREW YATES/AFP/Getty Images
3. Bayern Munich Revenue: $661 million
The Bavarian powerhouse already dominates in Germany but has been branching out through lucrative overseas tours. Alexander Hassenstein/Bongarts/Bongarts/Getty Images
4. Barcelona Revenue: $657 million
Europe's most successful club is opening new headquarters in Hong Kong and New York. David Ramos/Getty Images
5. Paris Saint-Germain Revenue: $643 million
Resurgent under wealthy Qatari owners, the Paris club has taken rapid steps to build its global profile. PASCAL GUYOT/AFP/AFP/Getty Images
6. Manchester City Revenue: $562 million
Also boosted by wealthy new owners, City is threatening its illustrious neighbors on and off the pitch. Mark Regan/Getty Images
7. Chelsea Revenue: $526 million
Premier League champions regularly tour the key markets of Asia and the U.S. Clive Mason/Getty Images
8. Arsenal Revenue: $487
London club has invested in digital communications to attract overseas fans.
Michael Regan/Getty Images
9. Liverpool Revenue: $415 million
Five-time Champions League winner is undertaking major commercial initiatives under U.S. owners. OLI SCARFF/AFP/AFP/Getty Images
10. Juventus Revenue: $379 million
Italian champion is using national pride in its marketing efforts. GIUSEPPE CACACE/AFP/AFP/Getty Images