The Brazil international has played a key part in Chelsea’s recent successes.
The attacking midfielder moved to Stamford Bridge in a £19m deal from Brazilian club Internacional in 2012.
Oscar can count on the support of his sister Gabrieli Emboaba in the English capital during tougher times in his Chelsea career.
Oscar has blossomed into an important player for Chelsea over the past four seasons.
The Blues star currently wears Chelsea’s number 10 shirt.
Oscar moved to Chelsea from his native Brazil in 2012.