final after beating Teymuraz Gabashvili, Santiago Giraldo, Roberto Bautista Agut and Martin Kližan. He successfully defended his title by beating Pablo Andújar in the final in two sets to win his ninth career title on the tour. At the 2015 Mutua Madrid Open, Nishikori was granted a first-round bye and proceeded by defeating David Goffin in three tough-sets in the second round. He reached the semifinals after beating Roberto Bautista Agut and David Ferrer in straight sets respectively. He then lost to Andy Murray in the semifinals, and his ranking dropped to 6th as a result of failing to defend his points from the final in 2014. Nishikori was given a tough draw at the 2015 Italian Open but managed to reach the quarterfinal after beating Jiří Veselý and Viktor Troicki, both in straight sets. He faced world No. 1 Novak Djokovic in the QF and lost in three sets. Nishikori opened his French Open campaign by defeating both Paul-Henri Mathieu and Thomaz Bellucci in straight sets to advance to the third round. He advanced to the 4R for the second time in his career after his third round opponent, Benjamin Becker, withdrew due to a right shoulder injury. Nishikori became the first Japanese man to reach the quarterfinals of the French Open in 82 years by beating Teymuraz Gabashvili. He then played home favorite Jo-Wilfried Tsonga, but eventually lost in five set. Nishikori opened his grass-court season by participating in the Halle Open where he reached the semifinals, only to retire in his match against Andreas Seppi down 1–4 in the first set due to his calf injury which he attained in his quarterfinal match. Nishikori decided to play Wimbledon, and he reached the second round by beating Simone Bolelli in five sets for the second straight year but then withdrew from his second round match against Santiago Giraldo, due to his calf injury acting on him again during his first round match. Nishikori opened his hard-court season by competing at the 2015 Citi Open defeating James Duckworth, Leonardo Mayer, Sam Groth, and Marin Čilić en route to the final where he beat John Isner in three tight sets to capture his third title of the year and 10th title overall. At the 2015 Rogers Cup, he reached the semifinals without losing a set and defeated Rafael Nadal for the first time in eight tries in the quarterfinals. He