America’s major sporting leagues dominate Forbes latest list of the most valuable sports teams in the world. Every one of the sports teams that cracked the top ten are sporting brands in their own right and prospective owners can expect to fork out $4 billion or more to pry them away from their current owners. Three of the teams are now worth more than $5 billion. Manchester United have slipped out of the top ten with a Bundesliga giant taking their place. The 10 most valuable sports teamsThree European football teams make the top 10 with Manchester United joining Spanish giants Real Madrid an…