Benfica midfielder Ramires will undergo a medical at Chelsea in the coming days and should complete a move to Stamford Bridge before the end of the week.
Ramires, 23, would be the second addition to Carlo Ancelotti's squad following the arrival of Yossi Benayoun from Liverpool.
Ancelotti targeted Ramires and Benayoun after releasing midfielders Joe Cole and Michael Ballack earlier in the summer.
Reports have claimed Chelsea would be willing to pay around £17million for Ramires, who played for Brazil in the World Cup earlier this summer.
Ramires is part-owned by a businessman and Chelsea would have to strike a deal that complies with the Premier League regulations, which outlaw third-party ownership of players.
Benfica president Luis Felipe Vieira said: "Ramires staying at Benfica does not depend solely on us. We have a partner and we must respect the contracts."
