AC Milan was the only team among the top 10 estimated to decline in value over the past year, dropping 4 percent.
Among players, Forbes estimated Paris Saint-Germain’s David Beckham as the highest earner at $50.6 million, with $44 million from endorsements. Real Madrid’s Cristiano Ronaldo was second at $43.5 million ($21.6 million in endorsements) and Barcelona’s Lionel Messi third at $40.3 million ($20 million in endorsements).
Forbes said in a statement: "This is the first time since Forbes began valuing soccer teams in 2004 that Manchester United is not No.1 on the list.
"Real Madrid has been consistently delivering the highest revenues of any soccer team in the world, despite an intense economic meltdown in Spain. With superstars like Cristiano Ronaldo on the pitch, and coach Jose Mourinho on the bench, Real Madrid has thrived under the leadership of billionaire president Florentino Perez.
"According to this year’s soccer valuations, the top 20 teams are worth an average of 968million dollars (£634m), an increase of 26% over last year. Forbes’ team values are enterprise values (equity plus debt) that are based on multiples of revenue that teams garner from television, premium seating, media, licensing, merchandise and concessions."