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Oscar wants to help in Chelsea's title push but is wary of exacerbating a hip injury that could force him to miss the World Cup.
The 22-year-old has not seen any game time in the Blues' past three matches, although he was on the bench for both legs of the Champions League semi-final with Atletico Madrid.
Oscar explained after Wednesday's 3-1 defeat that his absence is due to a hip injury, which is likely to see him miss Sunday's Barclays Premier League encounter with Norwich.
The Brazil midfielder is hoping to be back for the season finale at Cardiff, but is wary of putting his World Cup place in jeopardy.
"I'm not playing because I felt a pain due to an injury to the abductor," Oscar told Globo Sport. "In the last game against Liverpool I was not called on.
"Yes, I warmed [against Atletico] but Mourinho knew that I could hardly play.
"Maybe I will not play the next game because I could get a more serious abductor injury and he knows it.
Show all 23 1 /23Chelsea 1 Atletico Madrid 3 player ratings Chelsea 1 Atletico Madrid 3 player ratings Mark Schwarzerv- 6 Veteran continued in place of Cech and watched Koke cross-shot hit bar. Solid handling and made valuable stops but let down by off-colour defence.
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Chelsea 1 Atletico Madrid 3 player ratings Branislav Ivanovic - 6 Was defensive impetus behind victory at Anfield on Sunday but troubled by pace and imagination of Atletico’s forward play all evening.
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Chelsea 1 Atletico Madrid 3 player ratings Gary Cahill - 6 Centre-back has enjoyed a stellar campaign and made an important block from Costa but culpable for Lopez goal. Booked for taking out Costa.
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Chelsea 1 Atletico Madrid 3 player ratings John Terry - 6 Barged over by Costa and had hands full all night. Caught up in hesitancy as Atletico levelled score and found wanting as game went away from Chelsea.
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Chelsea 1 Atletico Madrid 3 player ratings Ashley Cole - 6 Kept at left-back as Jose tinkered but switched off badly for the equaliser. Paid the price as Mourinho took him off in an attacking switch after break.
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Chelsea 1 Atletico Madrid 3 player ratings David Luiz - 6 Went close with extravagant overhead kick in opening half hour and headed Willian free-kick against post. Lack of composure at times.
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Chelsea 1 Atletico Madrid 3 player ratings Ramires - 7 Unable to make Courtois work with shot from outside area. Struggled to make meaningful impact on proceedings, despite tireless running.
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Chelsea 1 Atletico Madrid 3 player ratings Cesar Azpilicueta - 6 Trusted with advanced role and hosts were rewarded when he set up Torres goal. Moved back into defensive role but lost Turan for Spaniard’s third.
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Chelsea 1 Atletico Madrid 3 player ratings Willian - 7 Wasted free-kick opportunity from just outside area. Threat from set-pieces and forward thrust led to Torres’ opening goal before tiring late on.
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Chelsea 1 Atletico Madrid 3 player ratings Eden Hazard - 5 Disappointing showing in first start since Chelsea’s last European home tie. Skied one effort and out of position for Atletico’s first and third.
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Chelsea 1 Atletico Madrid 3 player ratings Fernando Torres - 6 Chosen ahead of Eto’o and scored in European semi for third year in succession but refused to celebrate - setting the tone for rest of Blues’ evening.
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Chelsea 1 Atletico Madrid 3 player ratings Best off the bench - Samuel Eto'o - 5 Brought on for Cole early in the second half as Blues pushed for a second, but succeeded only in taking game further from Chelsea as he gave away a penalty.
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Chelsea 1 Atletico Madrid 3 player ratings Thibault Courtois - 8 Finally made first appearance at Stamford Bridge three years after joining. Confident in decision making and made stops from Terry, Luiz and Hazard.
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Chelsea 1 Atletico Madrid 3 player ratings Juanfran - 7 Fine display last week and impressed again here. Header gave Lopez chance for goal and important clearance after Terry effort kept visitors in command.
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Chelsea 1 Atletico Madrid 3 player ratings Joao Miranda - 8 Went down with panache under challenge from Hazard. Fine tackle on Torres and furthered his claims for place in Brazil’s World Cup squad.
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Chelsea 1 Atletico Madrid 3 player ratings Diego Godin - 7 Wrestled with Terry at corner but enjoyed more pleasing evening than Chelsea counterpart. Masterful showing from the Uruguayan.
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Chelsea 1 Atletico Madrid 3 player ratings Filipe Luis - 8 Strong and powerful in defence and not afraid to come forward in possession and spent lot of time in Chelsea half. Provided valuable back up for Turan.
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Chelsea 1 Atletico Madrid 3 player ratings Tiago - 7 Passing posed problems for Chelsea all evening on return to Bridge. Floated ball in for equaliser and also inspired the move for Turan’s third.
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Chelsea 1 Atletico Madrid 3 player ratings Mario Suarez - 7 Unwitting deflection for Torres opener. Enjoyed physicality of midfield battle and it was his hard work that allowed teammates to prosper further forward.
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Chelsea 1 Atletico Madrid 3 player ratings Koke - 8 Hit Schwarzer’s bar with in-swinging cross and added fizz to visitors attacks. Always a threat from set-pieces and conducted play.
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Chelsea 1 Atletico Madrid 3 player ratings Arda Turan - 7 Forced Schwarzer into stop at near-post and went tumbling in box under challenge from Azpilicueta. Kept focus to score the clinching third.
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Chelsea 1 Atletico Madrid 3 player ratings Adrian Lopez - 7 Sent headed effort straight at Schwarzer. Levelled at post just before half-time to put Spaniards in boxseat. Replaced by Garcia with his work done.
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Chelsea 1 Atletico Madrid 3 player ratings Diego Costa - 8 Appeared more interested in settling score with Terry before making mark. Fouled for penalty before getting up to, eventually, score.
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He continued: "We're treating me to try to play the final match of the Premier League, but I have to take care for the World Cup.
"We still have two very important games in the Premier League because Chelsea can be champions, but it is important to rest because the World Cup is here."
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