Kei Nishikori says his elbow injury will keep him off the court for a few more weeks.
The 29-year-old from Japan will not play his home event in Tokyo in two weeks or the Shanghai Masters, and has also scrapped plans for an exhibition against Roger Federer in Japan.
Nishikori said the injury had bothered him since the French Open, but that he was now almost pain-free once more.
"The good news is that there is great progress, it's healing," he was quoted by Japanese press as saying on his official app.
But he cannot yet return to competition.
"There is still swelling and fluid in the arm [and] elbow," he said. "And the doctors feel it's in my best interest to take 3-4 more weeks off.
"The Asian swing is obviously one of my favorite times of the year and I will work hard to come back stronger."
Nishikori is 8th in the rankings.