The bitter memory of a shock defeat at the Mohammed bin Zayed Stadium in Abu Dhabi is motivating Oscar to ensure Chelsea make no mistake when they take the field today in their Club World Cup semi-final against Monterrey in Yokohama.
The midfielder was part of the South America champion side Internacional, who were humbled 2-0 by TP Mazembe of the Democratic Republic of Congo in the last-four stage of the competition in Abu Dhabi two years ago, and the loss is still a painful memory for the 21-year-old Brazilian.
They missed out on a final clash with Inter Milan, who would go on to win the tournament, and the midfielder lamented: "It was unbelievable at the time, and what made it worse was the fact that we knew we had the quality to win that game and then beat Inter, as our team was very strong.
"It really was a major disappointment.
"We were all surprised because we knew our team was superior to theirs."
Oscar, who joined Chelsea in the summer, said he was determined his current employers would not suffer the same fate as his Brazil side.
"I have learnt from past experience with Internacional that you have to take one game at a time," he said. "If we get to the final, which I hope we do, and have to face Corinthians, it will be great for me personally to play against a Brazilian side, but I will be doing my best to help Chelsea win the game."