Fernando Manuel Fernandes da Costa Santos GOM (born 10 October 1954) is a Portuguese professional football manager and former player who played as a left-back.

He helped Estoril return to the top tier in 1991 and, in the following ten years, only worked in that competition, being in charge of Estrela da Amadora and Porto.

[17] After a third place in his debut season, only two points behind champions Porto, Santos witnessed the departure of captain and top scorer Simão Sabrosa to Atlético Madrid during pre-season.

[20] On 1 July 2010, Santos was named the new coach of the Greece national team, succeeding longtime incumbent Otto Rehhagel on a two-year deal.

[21][22] Having been named the country's Coach of the Year all sports included,[23] he subsequently qualified for the UEFA Euro 2012 tournament, reaching the last-eight stage.

Shortly before the start of the penalty shootout against Costa Rica, eventually lost 5–3, he was sent off by referee Ben Williams for apparent dissent.

He watched the decision unfold on a television from inside the stadium, and the defeat marked the end of his tenure as his contract expired the very next day;[25][26] he was initially banned for eight matches for the incident,[27] reduced to six upon appeal.

[29] His first game in charge took place on 14 October in a 1–0 win in Denmark for the Euro 2016 qualifiers,[30] and the side went on to reach the finals in France;[31] during his suspension, it was Ilídio Vale that sat on the bench.

[41] In the 2022 World Cup, after being disrespected by star forward Cristiano Ronaldo in the last group fixture against South Korea as he was replaced (2–1 loss), he decided to bench him for the knockout phase,[42][43] beating Switzerland 6–1 in the last 16, their highest tally in a World Cup at that stage since 1966, with Ronaldo's replacement Gonçalo Ramos scoring a hat-trick,[44][45][46] but being ousted by Morocco in the next round;[47] on 15 December, following constant criticism over his defensive tactics and style of play, he was dismissed.

[48][49] On 24 January 2023, Santos was unveiled as the new manager of Poland, succeeding Czesław Michniewicz who left the team shortly after the 2022 World Cup.

[50] Criticised for his style, his choice of players and his lack of appearances at Polish league and cup matches, defeats to Moldova and Albania in the Euro 2024 qualifying phase led to fans starting to demand his dismissal,[51][52] which took place on 13 September.