Diogo Pinheiro Monteiro

Diogo Monteiro was born in Geneva to Portuguese parents and came through the Servette academy, working his way from the club's U15 side to the U21s over five years. He made his professional debut for Servette against Basel in March 2021, aged just 16 years, one month and nine days, becoming the youngest centre-back to appear in the Swiss Super League and only the third-youngest player overall in the competition's history. Servette lifted the Swiss Cup that season, though Monteiro was not involved in the final against Zürich.

In January 2023 he moved to Leeds United, where he spent two years largely with the club's Under-21 squad, making 40 appearances in Premier League 2 and cup football and captaining the side. He was registered with the first team and named among the substitutes for a Premier League fixture against Southampton and an FA Cup tie against Fulham, but never made a competitive senior appearance for Leeds.

He left England in August 2025, joining Arouca on a permanent deal that runs until June 2028, with a release clause set at €10 million. The transfer included a sell-on arrangement under which Leeds retain half of any future fee. The move was framed as a chance to finally secure regular first-team football after two years largely on the fringes in England, and represents his first senior club outside his native Switzerland.