Alfa Semedo Esteves (born 30 August 1997) is a Bissau-Guinean professional footballer who plays as a midfielder for the Saudi Arabian club Neom and the Guinea-Bissau national team.

[2][3] Born in Bissau, Semedo started playing football at the local club Fidjus di Bideras.

[5] Following his return to Benfica in July 2018 for €2.5 million,[6][7] Semedo debuted for the first team in a 3–2 home win over Vitória de Guimarães in Primeira Liga on 10 August.

Later, on 2 October, he made his UEFA Champions League debut, scoring his first and winning goal for Benfica in a 3–2 away victory over AEK Athens in the UEFA Champions League group stage, thus ending the former's eight-match losing streak in the competition's group stage.

[10] On 8 July, he joined English club Nottingham Forest on a season-long loan, along with Benfica teammate Yuri Ribeiro (the latter on a permanent transfer).