Alex Barrena (born 10 October 2002) is an Argentine tennis player.
Barrena has a career high ATP singles ranking of 260 achieved on 30 June 2025. He also has a career high ATP doubles ranking of 617 achieved on 22 August 2022.
Barrena has won two ATP Challenger singles titles at the 2025 Challenger Tucumán and the 2025 Santa Cruz Challenger.