Japan's Kei Nishikori, seen here in action against Fernando Verdasco during their fourth-round match of the French Open in June 2017. Nishikori's agent says the 2014 US Open runner-up is pulling out of the Australian Open. Christophe Ena / AP Photo
Japan's Kei Nishikori, seen here in action against Fernando Verdasco during their fourth-round match of the French Open in June 2017. Nishikori's agent says the 2014 US Open runner-up is pulling out oShow more
