Diego Junqueira (Spanish pronunciation: [ˈdjeɣo xuŋˈkejɾa]; born December 28, 1980) is a tennis coach and former professional player from Argentina.

He plays left-handed with a double-handed backhand and his highest singles rank was world no.68, achieved on March 9, 2009.

Diego "Chuky" Junqueira did not appear to have much of a juniors career, according to available ITF results, which show only one top-level tournament for him, in which he qualified and lost first round in Argentina in 1998.

During late February to early April, Junqueira had good success at the Challenger level, reaching the semifinal in Chile (losing to No.

102 Luis Horna in the qualifying round to make the main draw of the 2008 French Open.