The talented 19 year old has been sensational this season, replacing Lewis Holtby and showcasing his creative potential going forward.
He had been linked with Arsenal and Borussia Dortmund, possibly as a replacement for Mario Gotze with the latter.
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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.