Juan Martín del Potro (born 23 September 1988), often nicknamed Delpo, is an Argentine professional tennis player who is currently ranked World No. 8 and is the highest-ranked Argentine. Del Potro achieved a top-10 ranking by the Association of Tennis Professionals for the first time on 6 October 2008. In January 2010, he reached a then-career-high ranking of World No. 4, after which del Potro had to withdraw from most of the tournaments in 2010 due to a wrist injury. He is coached by Franco Davín.