title for the second time defeating Milos Raonic in the final. However, in the Shanghai Rolex Masters, he later suffered a first round loss to Jack Sock in straight sets. Nishikori then played in the BNP Paribas Masters and reached the semifinals, defeating Tommy Robredo, Jo-Wilfried Tsonga and David Ferrer, each in three sets. However, he was ousted by Novak Djokovic in straight sets. This semifinal appearance guaranteed his berth for his ATP World Tour Finals debut. In his first Year-End ATP Finals, Nishikori defeated Andy Murray and David Ferrer, but was defeated by Roger Federer in straight sets. With this result, he progressed through to the semifinals and faced Novak Djokovic, losing in three sets, thus ending the year at a career high world No. 5. 2015: World No. 4, French Open quarterfinal Nishikori began the 2015 season by participating in the 2015 Brisbane International and reached the semifinals before being beaten by Milos Raonic in 3 tight-set tiebreaks. He reached the 2015 Brisbane International doubles finals with his partner Alexandr Dolgopolov but lost in straight sets. Nishikori equalled his best record yet in the Australian Open by reaching the quarterfinals for the second time in his career, dropping only 2 sets along the way, but he was beaten in straight sets by defending champion Stan Wawrinka. In February, Nishikori won his eighth singles title and became the first ever player to win the Memphis Open three times in a row, beating Kevin Anderson in straight sets in the final. He next participated in the 2015 Abierto Mexicano Telcel and reached the final, losing only a set to Kevin Anderson in the semifinals. By reaching the final, he earned enough ATP ranking points to move into a new career high world ranking of No. 4. However, he lost to David Ferrer in straight sets in the final. During the March Masters, he reached the fourth round of the 2015 BNP Paribas Open for the first time in seven appearances but was upset by Feliciano López in straight sets in the fourth round. In the 2015 Miami Open, he defeated Mikhail Youzhny, Viktor Troicki and David Goffin all in straight sets losing only a total of 10 games to reach the quarterfinals. However, he was upset by an in-form John Isner in straight sets. Nishikori began his clay-court season at the 2015 Barcelona Open Banc Sabadell where he reached the