the Davis Cup where Djokovic retired after dropping the first set. Del Potro returned to hard courts to play at the Rogers Cup, where he was upset by 33-year-old world No. 40 Radek Štěpánek. Del Potro ended the illustrious career of American tennis star Andy Roddick retiring him by winning their fourth round match before going on to lose in the quarterfinals of the US Open against Djokovic. In October, del Potro beat qualifier Grega Žemlja to win the Erste Bank Open in Vienna. He then beat Roger Federer to win the Swiss Indoors title, in Basel. The following week, he suffered a third-round loss to Michaël Llodra at the BNP Paribas Masters. During the round-robin stage of the ATP World Tour Finals, he won two of his three matches and qualified for the semifinals, where he was defeated by Djokovic in three sets, after leading by a set and a break. He ended the year ranked world No. 7, with a 65–17 win–loss record and four titles captured throughout the season. 2013: Wimbledon semifinal, return to top 5 Del Potro began his season at the Australian Open, where he was upset in the third round by Jérémy Chardy in five sets. The next month, he won the Rotterdam Open, beating Gaël Monfils, Ernest Gulbis, Jarkko Nieminen, Grigor Dimitrov in the semifinals, and Julien Benneteau in the final. At Dubai, del Potro beat Marcos Baghdatis, saving three match points, Somdev Devvarman, and Daniel Brands, but lost in the semifinals to eventual winner Novak Djokovic. At Indian Wells, del Potro defeated Nikolay Davydenko, Björn Phau, and Tommy Haas. In the quarterfinals, he beat Andy Murray for the second time in six matches. In the semifinals, he upset top seed Novak Djokovic, to end the Serb's streak of 22 victories. He then lost in the final to Rafael Nadal. Del Potro withdrew from the clay court season and from the French Open due to a viral infection. On grass, del Potro began at the 2013 Aegon Championships, where he won his first comeback match in three sets against Xavier Malisse, who had achieved his biggest win at the Queens Club against Novak Djokovic in 2010. Del Potro came back from behind in the third set to take the match. He defeated Daniel Evans, only to be upset in the quarterfinals by Lleyton Hewitt. At Wimbledon, Del Potro won against Albert Ramos, Jesse