The 25-year-old failed to score a single competitive goal at West Ham but appears to be enjoying his new life in Spain. The Italy international joined on a loan deal until the end of the season in January, having struggled to settle during a spell in the Premier League with West Ham.
The deal includes an option to buy the player outright from the Serie A champions and Valencia sporting director Jose Ramon Alesanc has claimed that an agreement to activate the clause has already been reached.
“No matter what, he is a part of Valencia,” said Alesanco, who was appointed as Jesus Garcia Pitarch’s successor this week.
“After this half a season, he’ll have four more years [at Valencia] and we have to get the best performance out of him.
“We hope he scores lots of goals and makes us happy in every match.”
It will cost Valencia €16m to make Zaza a permanent signing.