Injury-hit world No. 7 Kei Nishikori is "100 percent OK" to play at the season-ending ATP World Tour Finals, his management announced on Saturday.
Nishikori was forced to retire from his Paris Masters third-round match trailing 7-6(7-3), 4-1 against Richard Gasquet on Thursday due to pain in his abdominal muscles. But hospital tests showed no major abnormalities.
"The diagnosis was light inflammation and (Nishikori) will be 100 percent okay," his management said.
Nishikori's ab problem is the latest injury scare for the 25-year-old Japanese star, who sat out last month's Swiss Indoors with a sore right shoulder.
Nishikori had already secured one of the eight qualifying berths for ATP World Tour Finals getting underway in London on Nov. 15 before playing in Paris.