Spanish midfielder Cesc Fabregas has joined Chelsea on a five-year contract from Barcelona.
The 27-year-old Fabregas previously played for Chelsea's London rival Arsenal.
He says "I do feel that I have unfinished business in the Premier League" and thatChelsea "match my footballing ambitions with their hunger and desire to win trophies."
Fabregas is currently with the Spanish team in Brazil for the World Cup.
He spent three seasons at Barcelona.