Carlos Alberto Berlocq (born March 2, 1983 in Chascomus) is an Argentine professional male tennis player. He is nicknamed Charly. Berlocq's favourite surface is clay and he is currently coached by Jorge Gerosi.
Berlocq started playing tennis at the age of four and has had his success on the ATP Futures and Challenger circuits. In 2004 he made six consecutive finals in the Futures events, winning three of them, two finals each in Argentina, France and Slovenia. He also made his first Challenger final in Manta, Ecuador losing to Giovanni Lapentti and then won another Futures title in Argentina.
At the end of 2005 Berlocq finished inside the top 100 for the first time on the back of strong form on the Challenger circuit where he went 44–20 in singles and won two Challenger titles in Turin defeating Alessio di Mauro and in Cordenons defeating Jérôme Haehnel. Berlocq also qualified for his first ATP main event in Stuttgart losing to Răzvan Sabău and also played doubles in Bucharest with Mariano Puerta.