Sergio Santos Fernández (born 3 January 2001) is a Spanish professional footballer who mainly plays as a right-back for Real Unión.
He worked his way up their youth categories, and was promoted to their reserves in 2020.
[1] He made his professional debut with Real Madrid in a 6–1 La Liga win over Mallorca on 22 September 2021.
[2] On 21 July 2022, Santos was loaned to Segunda División side CD Mirandés for the season.
[4] On 29 July 2024, after being released by Real Murica, Santos signed for Real Unión on a one-year contract, with the option of a second year.