Carlos Alberto Berlocq (; born February 3, 1983) is an Argentine retired professional tennis player nicknamed Charly, Panther and Warlocq. His favourite surface was clay and he was last coached by Walter Grinovero. Berlocq's career-high singles ranking was World No. 37, achieved in March 2012. Career Berlocq started playing tennis at the age of four and had success on the ATP Futures and Challenger circuits. In 2004, he made six consecutive finals on the Futures circuit and won half of them, two each in Argentina, France and Slovenia. He also made his first Challenger final in Manta, Ecuador, losing to Giovanni Lapentti before winning 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 Tour, where he went 44–20 in singles and won two 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. He also played doubles in Bucharest with Mariano Puerta. Berlocq struggled to adapt his level from the Futures and Challengers to the ATP main level events and achieved only limited success on the ATP Tour. However, his first win was significant. At the ATP Masters Series event in Miami, Berlocq defeated the much-hyped American junior and wildcard entrant Donald Young 6–0, 6–0. Neither player had won a match on the ATP Tour and this win was achieved on a hardcourt, not Berlocq's favoured surface. After defeating Young, Berlocq played another American, James Blake, losing this match 0–6, 0–6 and therefore creating an unusual achievement of winning his first ATP-level match 6–0, 6–0 and then losing by the same scoreline in the next round. Berlocq won two consecutive matches for the first time on the ATP Tour to make the quarterfinals in Sopot after defeating Philipp Kohlschreiber and Lukáš Dlouhý. On May 29, 2007, Berlocq upset the No. 30 seed Julien Benneteau in four sets 6–7(5–7), 7–5, 6–2, 6–3 at the 2007 French Open. Berlocq won his first ever grass court match in 's-Hertogenbosch against former World No. 1 Juan Carlos Ferrero in three sets. 2011 At the French Open, he defeated Australian Bernard Tomic 7–5, 6–4, 6–2 in the first round. Berlocq was taken out by World No. 1 Novak Djokovic in three sets 6–0, 6–0, 6–2 in the