page_title: 2011 ATP World Tour Finals
section_title: Singles
hierarchical_section_title: 2011 ATP World Tour Finals / Qualified players / Singles
caption_attribution_description: Mardy Fish at the 2009 US Open
context_page_description: The 2011 ATP World Tour Finals was a tennis tournament that was played at the O₂ Arena in London, United Kingdom between 20 and 27 November 2011. The defending champion in singles was world no. 4 Roger Federer, while the defending champions in doubles were Daniel Nestor and Nenad Zimonjić. However, they did not defend their title together because they separated after the 2010 event. Zimonjic formed a team with Michaël Llodra for the season, and Nestor partnered with Max Mirnyi. Federer successfully defended his crown, winning an unprecedented sixth title, while Nestor and Mirnyi captured the doubles title.
context_section_description: On 14 May Novak Djokovic became the first qualifier, after reaching the finals of the Rome Masters.
  Novak Djokovic began the year by winning the Australian Open, his second Grand Slam title, defeating 2010 runner-up Andy Murray, 6–4, 6–2, 6–3, in the final. In February, he successfully defended his title for the second time at the Barclays Dubai Tennis Championships, defeating Roger Federer, 6–3, 6–3. The Serb closed the following month by clinching the "American double" (both hard-court Masters title in Indian Wells and Miami) for the first time since Roger Federer last did so in 2006. He defeated Rafael Nadal in both those finals in three sets, 4–6, 6–3, 6–2, and 4–6, 6–3, 7–6, respectively. It was the first time since 1995 that Indian Wells and Miami featured the same two finalists and the top 2 ranked players. His flawless season start continued onto the clay circuit with his successful defense of the 2011 Serbia Open trophy against Feliciano López, 7–6, 6–2. Djokovic went on to win his seventh title of the year in the Madrid Masters, ending defending champion Nadal's clay dominance in straight sets. At the Rome Masters, he repeated this achievement by defeating the Spaniard, 6–4, 6–4, in their fourth consecutive Masters final. His 43-match winning streak ended in the 2011 French Open, when Roger Federer—whom he had beaten three times in 2011 and who was the last to beat him in the 2010 ATP World Tour Finals—overcame him in four sets, 6–7, 3–6, 6–3, 6–7in the semifinal. Djokovic then won his first grass title and first non-Australian Grand Slam at Wimbledon, defeating Rafael Nadal, 6–4, 6–1, 1–6, 6–3, in the final. Djokovic became the 25th world no. 1, after reaching the final of Wimbledon. In the 2011 US Open Series, Djokovic finished second, after winning the 2011 Rogers Cup over American Mardy Fish, 6–2, 3–6, 6–4, and being runner-up to Andy Murray, 4–6, 0–3, after Djokovic retired due to a sore shoulder at the 2011 Western & Southern Open. He then won his third Grand Slam of the year at the 2011 US Open, after finishing runner-up twice at the Open, defeating Rafael Nadal, 6–2, 6–4, 6–7, 6–1, after defeating Roger Federer in the semifinals, coming back from two sets down and saving two match points. Djokovic also recorded the highest prize money in a single season of $11.2 million.
  On 8 June after reaching the third round of the Aegon Championships, Rafael Nadal became the second to qualify.
  Rafael Nadal began his season at the 2011 Qatar Open, being defeated in straight sets by defending champion Nikolay Davydenko in the semifinals. He went on to the Australian Open, where he also reached the quarterfinals, losing to compatriot David Ferrer in straight sets, which ended his chances of a "Rafa Slam". In the Indian Well-Miami Masters swing, Nadal reached the final twice, but lost both times to Novak Djokovic, both in three tight sets. Returning to the Europe for the European clay swing, Nadal headed to the 2011 Monte-Carlo Rolex Masters. Nadal took the championship over compatriot David Ferrer, 6–4, 7–5, his seventh consecutive Monte Carlo crown. Nadal continued his unbeaten clay streak going back to 2009 by winning the Torneo Godó. This tournament marked his 500th ATP victory, after beating Ivan Dodig in the semifinal. Nadal clinched the trophy for the sixth time, defeating David Ferrer for the second week in a row. Nadal saw his clay streak end as he lost to Djokovic again, this time in his home Masters at Madrid. He also lost to Djokovic at the Rome Masters. In the 2011 French Open, Nadal was forced to a five-set match for the first time in Roland Garros history in the opening round against John Isner, 6–4, 6–7, 6–7, 6–2, 6–4. He reached the final, where he overcame Roger Federer in four sets. This was his sixth French Open title, tying him with Björn Borg for the most French Open titles in the open era. At Wimbledon, Nadal lost his first Wimbledon match since 2007 in the final to Djokovic 4–6, 1–6, 6–1, 6–3. In the US Open Series, Nadal lost his first opening-round match since 2008 Rome, falling to Ivan Dodig, 
caption: Mardy Fish enters the top 10
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