Oscar is enjoying life at Chelsea under manager Jose Mourinho.
Oscar is looking to build on an impressive first season in English football and believes he will benefit from the managerial prowess of Mourinho.
"It's been great to work with Jose Mourinho," he told the club's official magazine, Chelsea FC.
"He is one of the best coaches in the world. We have seen he has already had a lot of success at Chelsea and I am just really happy to have the opportunity to work with him.
"You can already see the influence he has had on us during the first few games and I hope the team will be able to continue to grow under him as I will also be able to grow as a player.
"As early as pre-season we could see the belief with which he works. We could see the confidence he has with us as players but also the confidence within his own work. It is clear to us that he is a great coach."
