LONDON - Romelu Lukaku has said he may have to leave Chelsea if the Premier League giants sign Diego Costa. Lukaku has spent the past two seasons on loan at English top flight rivals West Bromwich 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. 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."–AFP