Speculation has mounted that the Spanish side are keen to bring in a forward for the coming season.
The South Korean has barely featured for Arsenal and could move to the newly promoted side on loan with a view to a permanent switch.
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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.