The Brazilian was forced out of the 2-2 draw with Manchester City early on.
It would be a major blow were he to miss two months of the season, having been sorely missed for half of the last campaign.
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Summer 2016 is set to be a very exciting time for football fans, as this is when the long awaited Euro 2016 tournament kicks off.
Since Guus Hiddink arrived at the helm, Chelsea have improved considerably after a tricky start to the campaign.