The 22-time grand slam champion was scheduled to face Nick Kyrgios in their semifinal match on Friday. Kyrgios will now head straight to the final to face the winner of the match between Novak Djokovic and Cameron Norrie.
“I have to pull out of the tournament,” Nadal said during a Thursday news conference. “I have a tear in the (abdominal) muscle.”
Nadal said he spent the whole day thinking about what he should do, but decided it wouldn’t “make sense” to keep going.
“If I keep going, the injury is going to be worse and worse,” he said, adding how “sad” he felt about it.
Nadal hinted that part of his decision was based on the fact he would have to win two matches, the semifinal and the final, to win the championship.
“I believe that I can’t win two matches,” he said. “I don’t want to go out there and not be competitive enough to play at the level that I need to achieve my goal with a big chance to make the things much worse.”
Nadal said he anticipated a three-to-four week recovery and looked to return to compete in upcoming tournaments as expected.
The Spaniard said the injury had been bothering him for about a week but worsened during his grueling quarterfinal match against Taylor Fritz on Wednesday. Although he came through, winning 3-6, 7-5, 3-6, 7-5, 7-6, he looked to be struggling with an injury to his abdomen at times.
CNN’s Matias Grez contributed to this report.