Nishikori said he will not need surgery, but he is unsure how long he will be sidelined and will fly home to Japan to see a doctor. His next scheduled match is in the Davis Cup for Japan against the Czech Republic in Toyko on Friday.
Nishikori was hoping to reach his first ATP Masters 1000 final.
“It was going to be a great challenge for me today,” Nishikori said. “Hopefully, I can play another time.”
Spectators on Friday are to be offered a chance to exchange their tickets for next year’s tournament.
“We will try to take care of all of our fans the best that we can,” Barrett said. “It’s not an optimal situation.”
Additional reporting by staff writer