The youngster is out with an ankle injury sustained in the North London derby against Tottenham a week ago.
It is unclear how long he will be out for at present, with Arsene Wenger set to inform the media about his condition later on Tuesday.
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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.