Japan’s Kei Nishikori pulled out of the Rothesay International tennis tournament in Eastbourne, England, just before his first-round match Tuesday, citing a right ankle injury. The injury-plagued former world No. 4 was slated to face sixth-seeded Argentine Mariano Navone in the grass-court warm-up event for Wimbledon, which begins next Monday. “I had a light sprain three days ago during practice,” Nishikori said. “I slipped on the grass. It has caused some slight inflammation, so I took an extra precaution.” It was to be Nishikori’s first match since he retired from a French Open second-round …