It was posted somewhere on the blog that Oscar's number was leaked on the ChelseaFC Megastore, though its prompt removal from the website may have had some question the legitimacy of the leak and whether he would indeed be given the number 11. This sparked debate over whether Oscar should receive the shirt previously worn by our recently departed hero Didier Drogba, or whether the number should be rested or retired, given the significance of the player who wore it previously.

via www.chelseamegastoreasia.com

However, if you take a look today you can see Oscar's shirt with the number 11 up on the Megastore along with the shirts of the other new signings Marin, Hazard and De Bruyne (despite De Bruyne's upcoming departure to Werder Bremen). Despite the lack of confirmation, this means that new player Oscar will be wearing the number 11 for Chelsea next season.