Romeu, who joined the Blues from Barcelona in 2011, is now tied to Stamford Bridge until 2017.

The former Spain Under-21 international spent last season on loan at Valencia, but remains in Blues boss Jose Mourinho's plans and played in Wednesday's 5-0 friendly win over Wycombe.

That was Romeu's first appearance for Chelsea since he suffered an anterior cruciate ligament injury at Sunderland in December 2012.

"Oriol Romeu has today signed a new three-year contract, keeping him at Stamford Bridge until 2017," a statement on Chelsea's website confirmed.