Guillermo Coria, born in Rufino, January 13, 1982, is a tennis coach and former Argentine tennis player, professional since 2000 and clay clay specialist, from 2003 to 2005 he was among the top ten in the ATP ranking.

He boasts nine titles on the major circuit, including two Tennis Masters Series, and the final at the Roland Garros 2004, the year in which he reached third position in the world rankings. In 2005 he begins to feel less competitive and loses concentration, factors which together with various injuries lead him to a rapid decline and to announce his retirement in 2009 at just 27 years old.

He is the son of Gabriela, a housewife, and Oscar, a tennis coach from whom he learns to play as a child. His younger brother Federico Coria also became a highly regarded professional tennis player. He is given his first name in honor of the great Argentine tennis player Guillermo Vilas. As a boy his favorite players are Andre Agassi and Marcelo Ríos.

Passionate about soccer, a discipline he practiced at an amateur level, he is a fan of River Plate. On 27 December 2003 he marries the Croatian Carla Francovigh, with whom he has children Thiago and Delfina. He considers the city where he lives, Venado Tuerto, to be the best in the world, and in 2004 he inaugurated the Academia Guillermo Coria at the city's Jockey Club.