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2014: Ninth French Open title and sustained injuries

Rafael Nadal began his 2014 season at the Qatar Open in Doha, defeating Lukáš Rosol in the first round and he won the title after defeating Gaël Monfils in the final.

At the Australian Open, he defeated Roger Federer to reach his third Australian Open final. This marked Nadal's 11th consecutive victory in a major semi-final, second only to Borg's all-time record of 14. In the final, he faced Stanislas Wawrinka, against whom he entered the match with a 12–0 record. However, Nadal suffered a back injury during the warm-up, which progressively worsened as the match wore on. Nadal lost the first two sets, and although he won the third set, he ultimately lost the match in four sets. The first tournament he played after that was the inaugural Rio Open which he won after defeating Alexandr Dolgopolov in the final. However, at the Indian Wells Open, Dolgopolov would avenge his loss, defeating Nadal in three sets in the third round. He reached the final of the Miami Masters, falling to Novak Djokovic in straight sets.

Nadal began his clay court season with a quarterfinal loss to David Ferrer in the Monte-Carlo Masters. He was stunned by Nicolas Almagro in the quarterfinals of the Barcelona Open. Nadal then won his 27th masters title at the Madrid Open after Kei Nishikori retired in the third set of the final. On 8 June 2014, Nadal defeated Novak Djokovic in the Men's Singles French Open final to win his 9th French Open title and a 5th straight win. Nadal equaled Pete Sampras' total of 14 Grand Slam wins. Nadal then lost in the second round of the Halle Open to Dustin Brown the following week.

Nadal entered the Wimbledon Championships in a bid to win the tournament for the third time. In the fourth round he was upset by Australian teenager Nick Kyrgios in four sets. Nadal withdrew from the American swing owing to a wrist injury. He made his return at the 2014 China Open but was defeated in the quarterfinals by Martin Klizan in three sets. At the 2014 Shanghai Rolex Masters, he was suffering from appendicitis. He lost his opening match to Feliciano Lopez in straight sets. Later, he was upset by Borna Ćorić at the quarterfinals of the 2014 Swiss Indoors. After the loss, he announced that he would skip the rest of the season to undergo surgery for his appendix.