If the play gives his consent to move to Valencia in this transfer window, he will play there on loan until the end of La Liga season.
The Spanish club are to pay Juventus a fee of approximately 16 million euros if they want to buy the attacker in the summer.
Zaza arrived at West Ham in the summer on a yearly loan deal but failed to find playing time in the Premier League.
The Italian featured for a total of just 572 minutes with the Hammers, without scoring even once, and manager Slaven Bilic has not fielded him at all since November.
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