Spanish Paula Badosa gave up the US Open while recovering from a back injury, announced the organizers on Friday.
The world’s number 12 has suffered a number of injuries, including a chronic lumbar problem that made it even think about retiring.
Last month, former number 2 announced that it would be away for a few weeks due to another back injury.
Badly played for the last time in Wimbledon, suffering a defeat in the first round.
The tennis player then revealed that she had suffered a rupture in the Psoas, the muscle that connects the bottom back to the upper leg.
With the withdrawal of Badasa, Switzerland Jil Teichmann will advance to the US Open main key, with simple matches starting on August 24.
Baddosa also had to withdraw from the new mixed pair event of the tournament, in which he was expected to be paired with Briton Jack Draper.