Offers of approximately 12,000,000 euros were submitted by clubs from the Gulf for Mateus Martinelli, a 24-year-old Brazilian defensive midfielder, but Fluminense rejected them. Fluminense values the player at a minimum of 20,000,000 euros. Martinelli is contracted until 2027, and Fluminense wants to extend his contract to 2030. The player has a current Transfermarkt market value of €14.00m. In the 2025/2026 season, he has made 3 appearances and 1 assist in the Campeonato Carioca, and 1 appearance in Série A. West Ham United, Beşiktaş, and Olympiakos Piraeus have also been linked with him.