Benfica are preparing to sell midfielder Axel Witsel this summer.
The exciting Belgian talent has attracted serious interest from Chelsea, Real Madrid and Manchester United, where Rio Ferdinand is a big fan.
"For me, Witsel will be a top player within a few years," tweeted Ferdinand last season.
De Telegraaf says Benfica have approached FC Twente for Leroy Fer as a direct replacement for Witsel.
The midfielder can leave Benfica for around £20 million.
