Juan Martín del Potro (Spanish pronunciation: [xwan ma??tin del ?pot?o]) (born 23 September 1988), nicknamed Delpo (IPA: [?delpo]), is an Argentine professional tennis player who is currently ranked world No. 9 in mens singles by the Association of Tennis Professionals (ATP).His biggest achievement has been winning the 2009 US Open, defeating Rafael Nadal in the semifinal and 5-time defending champion Roger Federer in the final. He was the first to defeat both Federer and Nadal during the same major and was the only man outside the Big Four to win a major between the 2005 French Open and the 2013 US Open, a span of 35 tournaments. He is also the second Argentine and the fifth-youngest man to win the US Open in the Open Era. Other career highlights include reaching the 2018 US Open final, winning the bronze medal in mens singles at the 2012 London Olympics, the silver medal at the 2016 Rio Olympics, the Indian Wells Masters in 2018, and being part of his countrys successful Davis Cup team; but his career has also been hampered by a succession of wrist injuries.
Del Potro achieved a top-10 ranking by the Association of Tennis Professionals (ATP) for the first time on 6 October 2008. In January 2010, he reached a ranking of world No. 4, after which del Potro had to withdraw from most of the tournaments in 2010 due to a right wrist injury. He returned in 2011 and was back to world No. 4 in January 2014 but had to withdraw from competition due to another wrist injury, but this time to his left wrist.
He again returned to the ATP World Tour in February 2016 after a long injury-induced absence. At the 2016 Summer Olympics he discovered a huge vein of form, defeating World No. 1 Novak Djokovic in straight sets in the first round and No. 3 Rafael Nadal in the semi-finals, claiming silver after falling in the final to No. 2 Andy Murray in four attritional sets. Only weeks later, Murray and del Potro met again in the Davis Cup semi-final in Glasgow, with del Potro emerging victorious in 5 sets. He then led Argentina to their first ever Davis Cup victory by defeating Croatias Marin ?ili? in the final in Zagreb. He reached his first major semi-final since 2013 by defeating Roger Federer in the quarter-finals of the 2017 US Open. In 2018, he won his first Masters 1000 title at the Indian Wells Masters, defeating defending champion and World No. 1 Roger Federer in the final. After reaching the semi-finals of the 2018 French Open, he again matched his career high of No. 4. Finally, in August, he achieved the World No. 3 ranking for the very first time. At the 2018 US Open, he reached his second Grand Slam final.
Having started playing tennis at the age of seven, del Potro won his first senior match (ITF level) in 2004 at the age of 15. At the start of the 2006 season, at 17 years of age he notched his first ATP Tour match win against world No. 117, Albert Portas. In 2008, he became the first player in ATP history to win his first four career titles in as many tournaments. He also completed the second-longest winning streak in 2008, and the second longest by a teenager in the Open Era with his winning sequence spanning 23 matches over five tournaments, falling just one short of Rafael Nadal.