Meanwhile, promoter Oscar De La Hoya believes there is a real possibility Cleverly could defend the title against Hopkins in the UK.
"What is very possible is Bernard Hopkins going to Britain to box Nathan," he said.
"We feel that the UK fans are some of the most passionate and knowledgeable in the world when it comes to boxing.
"A lot of fighters in the United States are now realising they should go overseas and challenge the best.'
