Bebe has admitted he thought Manchester United "were joking" when they signed him for 7.4 million pounds in 2010.
United matched Vitoria de Guimaraes' valuation for the winger but he featured only seven times under then-manager Sir Alex Ferguson, before being loaned out to Besiktas, Rio Ave and Pacos de Ferreira.
Bebe told Marca: "I had a contract with a termination clause of nine million euros and within two days there was a team that wanted to pay it. And I went to Manchester. I thought they were...
Germany youth international Hany Mukhtar has joined Benfica from Hertha Berlin.
Mukhtar, 19, was under contract at Hertha until 2015, but was not interested in staying at his hometown club beyond the summer and has made the move for 500,000 euros.