West Ham have announced the signing of Argentinian striker Taty Castellanos from Lazio.

The Hammers will pay a fee in the region of £26million and he has signed a four-and-a-half-year contract, with the option of a further year.

“I’m really happy because it’s a very important challenge for me personally and I’ve come to contribute, to try to help the team as much as I can,” said Castellanos.

“Every match is a battle, and I’m here to contribute that, to try to bring that energy, that fighting spirit I have inside, so that every match is as important and as tough as possible.

“I hope to give my all to the fans. I’ve always defended the jersey of every team with the utmost responsibility, and I want to tell them that I’m going to give everything, to defend this jersey, and obviously, to achieve our goals day after day. That’s the most important thing.”

He is available for tomorrow’s match against Nottingham Forest.