Spanish soccer giants Real Madrid increased their valuation by 19 per cent year-over-year to US$6.07 billion.
Soccer: Real Madrid C.F. ($3.26 Billion) – Robb Report
Real Madrid are the world's most valuable sports franchise (again) - NBC Sports
SoccerexPro 10 by Henley Media Group - Issuu
Study: European soccer clubs see value fall €6.1bn - SportsPro
The World's Most Valuable Soccer Teams 2014 - 2015-10-08 - The World's Most Valuable Soccer Teams 2014
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Real Madrid top Forbes' most valuable soccer teams list
The World's Most Valuable Soccer Teams 2022: Real Madrid, Worth $5.1 Billion, Is Back On Top
Cristiano Ronaldo - Wikipedia
Clasico countdown Real Madrid Barcelona's 20 most valuable players for next season and beyond - ESPN
Real Madrid, the world's most valuable club and PSG, the fastest growing