LONDON, ENGLAND - DECEMBER 14: Ramires of Chelsea celebrates scoring their second goal with Willian of Chelsea during the Barclays Premier League match between Chelsea and Crystal Palace at Stamford Bridge on December 14, 2013 in London, England. (Photo by Scott Heavey/Getty Images)

London - Romelu Lukaku has said he may have to leave Chelsea if the Premier League giants sign Diego Costa.

The 21-year-old Lukaku has spent the past two seasons on loan at English top flight rivals West Bromwich Albion and Everton, with Jose Mourinho the latest Chelsea boss seemingly happy to do without the Belgian striker.

“You know Chelsea: every year they buy a new top striker,” Lukaku was quoted as saying by several British newspapers on Saturday.

Lukaku, who scored 16 goals for Everton last season, added: “I remember me coming into the dressing room last year and seeing Samuel Eto'o and Demba Ba and going: 'Whoah! What's happening here?'

“But no problem. Many clubs are interested in me.

“At this stage I have to look to myself. I have to play a good World Cup. That's very interesting for all the players looking for a transfer, and I must be one of them. Chelsea know my point of view.”