Christian Lionel Díaz (born 12 May 1976) is an Argentine football manager and former player who played as a left back.
Born in Florencio Varela Partido, Buenos Aires, Díaz started his career with Club Atlético Independiente in 1995.
In his first season as a professional, he helped El Diablo Rojo win the South American Supercup in an eventual 2–1 aggregate triumph against Clube de Regatas do Flamengo (he did not take part in the final, however).
In 2000, Díaz moved to Italy and joined Udinese Calcio, only missing three Serie A matches as the team finished in 12th position.
[4] As an interim, he led the team to a 5–4 away win against Boca Juniors in the same month, ending the opposition's 33-match unbeaten run in national competitions;[5] during his tenure at the Estadio Libertadores de América, he also managed an unprecedented four consecutive home victories as well as a 4–1 defeat of Racing Club de Avellaneda in a local derby, but the club was also relegated to the Primera B Nacional even though he left into the season to be replaced by Américo Gallego.