According to O Dia, West Ham United are one of the teams that have submitted bids for Fluminense midfielder Martinelli, but their offers were lower than his asking price of $23 million (€20 million, £17.4 million).

An offer of approximately €12 million was submitted by West Ham for Fluminense's Matheus Martinelli. Proposals of a similar value were also made by Olympiacos, Besiktas, and teams from the Gulf. Fluminense rejected all these offers. The club values the 24-year-old Brazilian defensive midfielder at a minimum of €20 million. Martinelli's contract is valid until 2027, and the Brazilian club is reportedly looking to extend his deal until 2030. His current market value is listed by Transfermarkt as €14.00m. In the 2025/2026 season, Martinelli has made 3 appearances, providing 1 assist, in the Campeonato Carioca, and 1 appearance in Série A.