Chelsea have signed midfielder Nemanja Matic from Slovakian club MFK Kosice.
The 21-year-old, who has two caps for Serbia, has penned a four-year contract at Stamford Bridge.
Kosice president Blazej Podolak confirmed the transfer fee is £1.5m.
The 6ft 4in midfielder joins compatriot Branislav Ivanovic at the Blues.
He told the club's official website: "I know a lot about Chelsea, I have been following them.
"I play together with Branislav in the national team and have spoken to him about Chelsea. The first time when I met him to play in the national team I asked a couple of questions.
"I am a solid midfielder, I have a lot to offer and for sure to progress and I will show everyone why I am at Chelsea.
"I am a central midfielder and I know I am not well known but I have physical power and I am quite a technical, left-footed player.''
Matic also revealed he had a trial at Middlesbrough in January.
He added: "I was there in the winter, when I came it was winter in the north of England so it was not very nice, but the squad was okay and I liked it.''