Agustín Calleri (Spanish pronunciation: [aɣusˈtiŋ kaˈleɾi],[a] Italian: [kalˈlɛːri, ˈkalleri];[1] born 14 September 1976) is a retired professional male tennis player from Argentina.

Born in Río Cuarto, Córdoba, Argentina, he picked up first ATP win in 1999 over Jan Vacek at Roland Garros.

In 2003 he won his first ATP title of his career in Acapulco where he defeated Gastón Gaudio, Marcelo Ríos, Félix Mantilla and then Mariano Zabaleta in the final and reached his career-high ranking of World No.

In 2004 he beat Andre Agassi in Miami before losing to Vince Spadea and reached the decisive match at Costa Do Sauipe.

Calleri made his first final on hardcourt in New Haven losing to Russian Nikolay Davydenko 6–4 6–3 and after this result will move inside the top 30 in the ATP rankings.