The new deal will keep the 20-year-old at Rennes until the summer of 2015. The midfielder’s previous deal was due to expire in 2014.
Real Madrid, Manchester United and French side Marseille have all been linked with the youngster in recent months.
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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.