|24 Jul 21||Alvarado ||-|| San Martin|
|31 Jul 21||San Martin ||-|| Estudiantes de|
|07 Aug 21||Mitre ||-|| San Martin|
|14 Aug 21||San Martin ||-|| Atlanta|
|21 Aug 21||Chacarita Juniors ||-|| San Martin|
|20 Jul 21||Tigre|| ||0 - 1|| ||San Martin|
|13 Jul 21||San Martin|| ||1 - 2|| ||Quilmes|
|05 Jul 21||Agropecuario|| ||0 - 1|| ||San Martin|
|28 Jun 21||San Martin|| ||2 - 0|| ||Deportivo Maipú|
|23 Jun 21||Temperley|| ||0 - 1|| ||San Martin|
Club Atlético San Martín (mostly known as San Martín de Tucumán) is an Argentine sports club founded in 1909 and based in the city of San Miguel de Tucumán, Tucumán Province. The club is notable for its football team, which will play in the Argentine Primera B Nacional .
San Martin played every season in the Nacional championship between 1968 and 1985. El Santo has also played 3 seasons in the Argentine Primera División, in 1988/89, 1991/92 and in 2008/09.
The club's most notable victory was a 6–1 win over Boca Juniors in the Bombonera on November 20, 1988. After playing the 2008–2009 season in Argentina's First Division, San Martín was relegated to the Primera B Nacional Argentina. In 2011, after losing the Promoción, San Martín was relegated again to a lower division, the Torneo Argentino A.
Other sports practised at the club are field hockey, handball, martial arts, rugby union, swimming, tennis and volleyball.