Diego Cubas

Diego Cubas (born 14 March 1986) is a Brazilian former professional tennis player.

Born in Joinville, Cubas was a number one junior in Brazil and represented the country in a 2004 Davis Cup tie against Venezuela in Caracas. He was beaten in the first singles rubber by Jimy Szymanski in four sets but won in the reverse singles against Jhonnatan Medina-Álvarez. During his time on the professional tour he won two ITF Futures titles, both in doubles. He also played collegiate tennis in the United States for the University of South Carolina.