The 18 year-old midfielder is a regular with coach Juliano Belletti's Barca Atletic this season.
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However, his future with Barca is in doubt with his contract running down this campaign.
Mundo Deportivo says watching Hernandez is European champions PSG, which spy the chance to ferry the prospect to Paris for a knockdown compensation fee next year.
Indeed, PSG are already in contact with Hernandez's camp and there is an agreement to step up talks over the New Year.