Santiago Denia Sánchez (born 9 March 1974), commonly known as Santi, is a Spanish retired footballer who played as a central defender, currently manager of the Spain under-21 national team.

[1][2] Santi signed for Atlético Madrid in the summer of 1995, being crowned league and Copa del Rey champion in his first season as part of a defensive line which also included youth graduates Juan Manuel López and Roberto Solozábal.

In 2004–05, after the signing of Pablo Ibáñez – who also came from Albacete – he featured in no games at all in the first half of the season, and was subsequently allowed to leave on loan in January 2005 to his first club.

[7] Santi eventually returned to Atlético Madrid in early February 2009, as assistant to newly-appointed Abel Resino who had replaced Javier Aguirre.

[10] Santi was capped twice for Spain, his debut coming on 11 October 1997 in a 1998 FIFA World Cup qualifier against Faroe Islands (3–1 in Gijón, playing the entire match).