Santos joined Chelsea from Vasco da Gama in January 2023 but was immediately sent back to the Brazilian outfit on a short-term loan. At the start of the 2023-24 campaign, the young midfielder was once again sent out on a temporary deal to Nottingham Forest, but was called back in January 2024 due to lack of game time. A subsequent loan move to the Blues' sister club Strasbourg finally proved to be fruitful for the 21-year-old as he contributed 11 goals and five assists in 34 appearances across all competitions in 2024-25.