Sepp Blatter has said Cristiano Ronaldo should be allowed to leave Manchester United for Real Madrid if he wants. "If the player wants to play somewhere else, then a solution should be found because if he stays in a club where he does not feel comfortable to play then it's not good for the player and for the club," said the president of Fifa, football's world governing body.

"There's too much modern slavery, in transferring players or buying players. We are trying now to intervene in such cases. The reaction to the Bosman law is to make long-lasting contracts to keep the players, and then if he wants to leave there is only one solution, he has to pay his contract."

When asked about the protracted wrangle over the 23-year-old Portugal winger's future, Blatter insisted players should be allowed to leave with impunity when they want to move clubs. "The important thing is, we should also protect the player," he said. "I'm always in favour of protecting the player, and if the player he wants to leave, let him leave."