Having won last season's Champions League, the London side will represent Europe in December's tournament between each continent's regional title-winners.
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"I'm thinking about it already," Oscar told Globoesporte.
"I lost the tournament once, while I was playing for Internacional. Now I really want to win it with Chelsea.
"And we may face Corinthians, a big Brazilian club and a rival of both Inter and Sao Paulo.
"The club will think about it when we get closer to it but the Brazilian players are already thinking about it a little. We think about Brazilian football – and Corinthians."
Chelsea will enter the competition at the semi-final stage on December 13, with the third-place play-off and final both taking place three days later.