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Oscar was brought to Chelsea from Brazilian side Internacional as a highly rated young player, for the fee of around £25m.
Oscar did well for Chelsea before a big money move to Chinese side Shanghai SIPG in December 2016.
Oscar particularly linked up well with Eden Hazard, Juan Mata and fellow Brazilian Willian, both on the pitch and off the pitch.
Chelsea have posted a picture of Oscar, Eden Hazard and Willian heading to a training session 6 years ago on this day. The former Stamford Bridge midfielder responded to the photo: “Great times!” he tweeted.
Oscar made 203 appearances for the Blues, scored 38 goals, provided 37 assists and won 4 major trophies, including 2 Premier League titles and a Europa League trophy.