Santiago Juan Gentiletti Selak (born 9 January 1985) is an Argentine former professional footballer who played as a centre-back.

Gentiletti played over 68 games for Gimnasia de La Plata before signing for Provincial Osorno of Chile in 2008.

In 2010, he was signed by Argentinos Juniors and immediately established himself as an important member of the first team squad under manager Claudio Borghi.

In August 2014, after winning Copa Libertadores with San Lorenzo from Argentina, he moved to an Italian club, Lazio.

[4] Argentinos Juniors San Lorenzo This biographical article related to association football in Argentina, about a defender born in the 1980s, is a stub.