Agustín Calleri (born September 14, 1976 Río Cuarto) is a professional male tennis player from Argentina. He won his first title as a professional player in Acapulco in 2003 beating his countryman and friend Mariano Zabaleta. His nickname is Gordo that means Fat in Spanish. He is known as a hard-hitter and he prefers playing on clay.
In 1999 he picked up first ATP win over Jan Vacek at Roland Garros. Also advanced to first quarterfinal at Umag. In 2000 he made the third round in Roland Garros, before losing to Andrei Medvedev. He beat Marat Safin in Kitzbühel and pushed Pete Sampras to two tie-breakers in US Open's third round. Then in 2001 he won three challenger events beating Juan Ignacio Chela and David Nalbandian.
He finished in Top 50 for his first time in 2002, and had match points to Nicolás Massú in Buenos Aires final. Later in October he beat Marat Safin and Thomas Johansson to make an impressive quarterfinal in Paris.
In 2003 he won his first ATP title of his career in Acapulco where he defeated Gastón Gaudio, Marcelo Rios, Felix Mantilla and then Mariano Zabaleta in the final and reached his career-high ranking of World No. 16. In Estoril he reached the final but lost to Nikolay Davydenko. In Hamburg he made his greatest result reaching the final before losing to Guillermo Coria in straight sets. He also posted a stunning win against former No. 1 Juan Carlos Ferrero in Davis Cup.
In 2004 he beat Andre Agassi in Miami before losing to Vince Spadea and reached the decisive match at Costa Do Sauipe. In 2005 he lost the final in Amersfoort to Chilean Fernando González.
Calleri won his second career title in the 2006 Generali Open at Kitzbühel which came three years after his first title in Acapulco for the loss of only one set along the way he defeated Nicolas Massu, Gastón Gaudio, Fernando Verdasco before defeating fellow countryman Juan Ignacio Chela 7-6 (9) 6-2 6-3. 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.
