Tiago Carvalho Santos (born 23 July 2002) is a Portuguese professional footballer[1] who plays as a right-back for Ligue 1 club Lille.

[2] Santos made his professional and Primeira Liga debut as a starter in a 2–2 draw with Rio Ave on 19 August 2022, in which he assisted the opening goal of the match.

However, Sporting CP invoked an "anti-rival" clause inserted into Santos' contract when he joined Estoril, which stated that the Lions were owed €20 million if the player was sold to Benfica or Porto; for that reason, the move collapsed.

[7] Thirteen days later, Santos made his debut in European competitions, starting in a 2–1 home victory over HNK Rijeka in the play-off round of the UEFA Europa Conference League.

[10] He made his international debut for the Portugal U21s on 8 September 2023, starting in a 3–0 home victory over Andorra in a qualifying match for the 2025 UEFA European Under-21 Championship.