Cassiano Pereira is now flying to London to try to resolve the matter.
"Yes on May 14, I'll travel to London and two days later I will meet in London with the leaders of Manchester United to discuss the future of Fabio.
"It is true that so far Benfica is the only option. Moreover, (Sir Alex) Ferguson himself has said this. Let's see what happens, but our idea is to solve this issue during the meeting we will have.
"I think everything is well underway to having an agreement with Benfica," he told O Jogo.