According to Sully (UtdDistrict), clubs such as Napoli like Mateus Fernandes, but there is no indication they are seriously trying to sign him.

Several top clubs are monitoring Mateus Fernandes following West Ham's relegation to the Championship. According to Caught Offside, Napoli is among the clubs that have shown a definite interest in the midfielder. West Ham has reportedly set the transfer fee between 50 and 60 million euros, aiming to maximize profit after relegation. The high price requested by West Ham could reduce the interest of some potential buyers.

Napoli are monitoring West Ham United's 21-year-old Portuguese midfielder Mateus Fernandes, whose potential departure has become more likely following his club's disappointing season and the prospect of a major rebuild. West Ham have placed a valuation of €50–60 million on the player, a figure that is expected to decrease if the team is relegated. Inter and Juventus are also monitoring the situation, while Manchester United, Arsenal, Paris Saint-Germain, Atletico Madrid, Chelsea, and Aston Villa have also shown interest. Fernandes, who joined West Ham in August 2025 for a reported €44 million, has one cap for Portugal and a contract that runs until 2030. His current market value is listed by Transfermarkt as €35.00m.