Reports in Portugal suggest that Benfica are in London to engage in negotiations with Chelsea about defender David Luiz.
The Brazil international has been strongly linked with a move to Chelsea for the past weeks as the Blues look to strengthen their backline.
Benfica and Chelsea have so far failed to reach a compromise for David Luiz, who has a release clause of €50 million (£42.5m), with the Portuguese club playing hardball over the fee.
However, it is now suggested that a deal could be in the making after Benfica president Luis Filipe Vieira flew to London in the company of agent Giuliano Bertolucci to hold talks with Chelsea over a potential move.
It is believed that the Blues are ready to offer €25million (£21.2m) plus one of their players in order to meet Benfica's demands.
Full-back Paulo Ferreira and winger Salomon Kalou have been tipped as possible bargaining chips, but Portuguese sources report that Benfica are more interested in Chelsea's youth ranks.
Benfica signed Olhanense centre-back Jardel last week in what could be seen as a sign they are ready to cash in on David Luiz, whom they signed from Vitoria in 2007.