The Velez Sarsfield striker has arrived in England and is reportedly set to sign a three-year deal at Upton Park.
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The 27-year-old is now looking forward to linking up with West Ham and attempting to make a name for himself in the Premier League.
He told Sky Sports News: "It's a new chance for me. West Ham called me. They are a fierce team and now I think I want to play [there]."
Countrymen Carlos Tevez and Javier Mascherano have previously plied their trade at Upton Park and Zarate confirmed that he has briefly spoken to the duo.
"Yes, [I have spoken to them] a little bit," he remarked. "Now we will talk [with West Ham's owners] and maybe I will sign."