Emma Raducanu admitted she has 'no idea' if she will be fit for Wimbledon after suffering another injury blow in Nottingham.
Raducanu was playing her first tournament on British soil since winning the US Open last year, but it ended abruptly due to injury.
The British number one was trailing 4-3 in the first set to Viktorija Golubic of Switzerland when she called it a day after a medical timeout.
It is the third tournament in just over three months in which Raducanu has retired injured following Guadalajara and Rome.
She is currently due to play Birmingham next week followed by Wimbledon on June 27, but at the stage she is unwilling to offer any guarantees.
"I think I pulled something," Raducanu said. "I'm not really sure what exactly happened. An absolute freak injury. I don't know what I could have done about it,"
"I need to get a scan first. I am not going to 'Google doctor' myself. I will get it checked out. Then we will see from there.
"I have no idea [about Wimbledon]. It could have just seized up and gone into spasm and then it is really bad for a few days. I cannot diagnose myself. I will get it checked out."
"It is just a shame. I am obviously disappointed and it is really bad luck.
"That's out of my control, but right now all I can focus on is what I am doing and I think I am doing a lot of good work.
"I just need to trust that it will come and right now it is happening for a reason and I am exactly where I need to be."
Emma Raducanu was the second seed at Nottingham behind world number five Maria Sakkari, who won her opening match 6-2, 6-3 against Colombia's Camila Osorio.
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