Manchester United named America 's most valuable club by Forbes for sixth straight year . Real Madrid come second on list , with Arsenal third and Barcelona fourth . Manchester United were named the world 's most valuable football club for the sixth year in a row in Forbes magazine 's annual table . Top 20 clubs saw their average value rise to $ 800 million from $ 691 million .
Manchester United named America 's most valuable club by Forbes for sixth straight year . Real Madrid come second on list , with Arsenal third and Barcelona fourth . Top 20 clubs saw their average value rise to $ 800 million from $ 691 million .