West Ham hope to wrap up the £19.2m signing of Luis Guilherme from Palmeiras following his medical on Tuesday.
The 18-year-old Brazilian winger is expected to sign a five-year contract with the Hammers.
He has agreed to join with the transfer fee including £5m in add ons and a 20 per cent sell on for Palmeiras.
A pacey winger that can also operate as a second striker, Guilherme made his senior debut for the Brazilian side in April 2023, and went on to make a total of 19 appearances in the Brasileirao Serie A last season.