Real Madrid have retained their place as the most valuable football team in the world for a third straight year, while the Premier League boasts eight teams in Forbes' top 20.The reigning European champions' value has dropped five per cent to $3.26billion (£2.13billion) this year, but their $746million (£489million) revenue is the highest of any sports team in the world.Rivals Barcelona are second in the 2015 list with a value of $3.16billion (£2.07billion), followed by Manchester United at $3.10billion (£2.03billion).Louis van Gaal's men are one of eight Premier League sides in the top 20, with Manchester City, Chelsea, Arsenal and Liverpool amongst the top-eight most valuable clubs.Tottenham, Newcastle and West Ham complete the Premier League's representation, following the recent £5.136billion domestic television deal.Forbes' top 10 most valuable teams of 2015:1) Real Madrid $3.26billion (£2.13billion)2) Barcelona $3.16billion (£2.07billion)3) Manchester United $3.10billion (£2.03billion)4) Bayern Munich $2.35billion (£1.54billion)5) Manchester City $1.38billion (£905million)6) Chelsea $1.37billion (£898million)7) Arsenal $1.31billion (£859million)8) Liverpool $982million (£644million)9) Juventus $837million (£549million)10) AC Milan $775million (£508million)
Source: PA