Mateus Gonçalo Espanha Fernandes (born 10 July 2004) is a Portuguese professional footballer who plays as a midfielder for Premier League club Tottenham Hotspur and the Portugal national team.
Fernandes is a graduate of Sporting CP's youth system. He made 10 first-team appearances for Sporting, and had a spell on loan at Estoril, before joining Southampton in August 2024. He was signed by West Ham United in August 2025, for a transfer fee of more than £40 million. In July 2026, Fernandes joined Tottenham Hotspur.