AS says Lille and Granada have also been linked with Grbic this summer.
However, Osasuna are now in advanced talks to sign the young shot-stopper.
Osasuna have already done business with Atletico this week, taking left-back Manu Sanchez on-loan for the season.
Atletico would prefer to sell Grbic over a loan as they need to raise cash to buy Dusan Vlahovic from Fiorentina.
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