Zaza has netted 18 League goals in the Second Division this term during a loan spell at Ascoli.
"He has an expiring contract so his situation is complicated," Sampdoria director general Carlo Osti told Radio Kiss Kiss.
"I don't know what his future will be right now.
"If there is interest in him then we'll see what to do, but we only want players at Sampdoria who want to wear the shirt."
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