West Ham have announced the signing of Palmeiras winger Luis Guilherme.

The 18-year-old, who has represented Brazil at U16 and U20 level, becomes the Hammers’ first signing under new head coach Julen Lopetegui and joins on a five-year deal for a fee understood to be £25m.

West Ham technical director Tim Steidten flew to Brazil earlier this month to conclude the deal, with several Premier League clubs interested in the winger.

“I’m very happy to be signing with West Ham United, a club that trusted in my work,” said Guilherme.

“I also want to thank everyone at West Ham, particularly Tim and his team who came to Brazil, and not only talked with me, but also with my family.

“They presented the project, and both my family and I liked it. So, I’m very happy to be signing with this club and hope to contribute as much as possible. If things go well, we have a beautiful journey ahead.

“[Lopetegui] and I already had a conversation. He showed me his project and I believe I’ll learn a lot from him. He’s coached at the national level in Spain and managed big clubs.

Source: Sky Sports