Switzerland's Roger Federer and Japan's Kei Nishikori before the Barclays ATP World Tour Finals at The O2 Arena, London Stock Photo - Alamy
ATP World Tour Finals 2014: Kei Nishikori beats substitute David Ferrer, but must wait for Roger Federer vs Andy Murray to learn fate | The Independent | The Independent
2015 Hot Shots of the Year - Roger Federer and Kei Nishikori - YouTube
Australian Open 2017: Roger Federer was playing good, aggressive tennis again, says Kei Nishikori-Sports News , Firstpost
Roger Federer Uniqlo deal 'not motivating' for Kei Nishikori | Tennis | Sport | Express.co.uk
Roger Federer vs Kei Nishikori, Australian Open: Swiss stuns fifth seed to reach 49th career quarter-final
Roger Federer, Kei Nishikori not among Monte Carlo field
November 6, 2011: Roger Federer thumps Kei Nishikori for fifth Basel crown
Roger Federer breezes past Kei Nishikori at ATP World Tour Finals | ATP World Tour Finals | The Guardian
I was overwhelmed" - Kei Nishikori explains why he shed a tear for Roger Federer at recent Tokyo fan event
Roger Federer suffers blow in bid for 100th career singles title after shock loss to Kei Nishikori at ATP Finals | The Independent | The Independent
ATP Finals: Roger Federer Loses To Kei Nishikori In Opener | Tennis News
Indian Wells 2019: Roger Federer and Kei Nishikori head to Round 3; Djokovic scores 50
Roger Federer upset by Kei Nishikori at Miami Masters | CNN
Roger Federer Eliminates Kei Nishikori From World Tour Finals | Tennis News
Roger Federer beats Kei Nishikori in epic five-set Australian Open match | Roger Federer | The Guardian
Roger Federer Wimbledon 2021 Report, Advances Round 3, Zverev Wins; Kei Nishikori, Svitolina, Dimitrov Knocked Out| Indiacom | Wimbledon 2021 Results
Roger Federer, Kei Nishikori, Roger Brennwald - Kei Nishikori Roger Brennwald Photos - Zimbio
Kei Nishikori: "It was great to see Roger Federer on the court"
Roger Federer and Kei Nishikori will take to the tennis court for Uniqlo
Kei Nishikori stuns Roger Federer in ATP Finals opener
Nishikori shock for Federer | Deccan Herald
