The summer signing from Internacional is particularly excited by the prospect of potentially facing his former club's rivals, Corinthians, in December's tournament in Japan
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.