Santiago "Santi" Arias Naranjo is a Colombian professional footballer who plays as a right-back for Spanish club Atlético Madrid and the Colombia national team.
Arias was a youth product of the La Equidad academy. He was moved into the senior squad during 2009 making his professional debut that same year against Deportes Tolima. He soon became a regular for the Bogotá based club and racked up 28 appearances. His notable performances earned him the opportunity to represent his nation at the 2011 FIFA U-20 World Cup hosted in Colombia. After a successful spell at his club and internationally, he soon moved to Portugal to join the ranks of Lisbon team Sporting C.P.
Santi Arias was part of the Colombia U17 team who finished fourth in the 2009 FIFA U-17 World Cup, playing all matches (except third-place match, making a total of 6 appearances) and scoring the first penalty during the quarter-final penalty shoot-out against Turkey.
Santi Arias played all 9 matches for Colombia U20 team when they finished sixth in the 2011 South American Youth Championship. Eduardo Lara, Colombia's coach, also called him for the 2011 Toulon Tournament where Arias, who started all 5 matches, was part of Colombia's team that reached and won the final.
Arias received his first call up for Colombia's senior team to dispute the 2014 World Cup qualifying matches against Chile and Paraguay, following first choice Camilo Zúñiga's injury.