LONDON, England -- Chelsea have completed a deal to sign midfielder Nemanja Matic from Portuguese side Benfica, the Premier League outfit confirmed on Wednesday.
Matic, 25, returns to Stamford Bridge for a transfer fee believed to be 21 million pounds ($37.6 million) after leaving the club for Portugal three years ago.
"I am very happy for this opportunity. I just want to say I will give my best to help the team and make the Chelsea fans happy," Matic said.
The Serb originally joined the Blues from Slovakian club MFK Kosice on a four- year deal for 1.5 million pounds ($2.7 million) in 2009.
He made two substitute appearances in the Premier League and was an unused substitute in Chelsea's 1-0 win over Portsmouth in the 2010 FA Cup final.
The midfielder re-joins the Blues on a new five-and-a-half year contract.
"He has grown as a player in Portugal and has become a fantastic all-around midfielder," Chelsea manager Jose Mourinho remarked.