The 19-year-old had to withdraw from her game against Switzerland’s Viktorija Golubic with what appeared to be a problem with her team.
It comes as world number 3 Alexander Zverev underwent surgery on torn ligaments in his right ankle which will almost certainly rule him out of Wimbledon.
The grass major is set to start on June 27, and while Zverev is unlikely to recover, Raducanu says she has “no idea” if she will compete.
“First game, absolute monster. I think I shot something. I don’t really know what exactly happened. I just got off the pitch,” Raducanu told reporters after the game.
“It’s on the side of my body. It feels, I don’t know, maybe around my rib or something.
“It could have seized up and caused spasms and then it got really bad for a few days. But I have no idea. I can’t diagnose myself, so I’m going to have it checked out.”
She has been unable to find consistency since her breakthrough year and is currently without a coach.
Zverev begins rehab
Meanwhile, Zverev is already in rehab after his surgery.
The 25-year-old is in the hunt for the first Grand Slam trophy of his career but will have to wait for his injury to recover.
“After further examination in Germany, we received confirmation that the three lateral ligaments of my right ankle were torn.
“To return to competition as quickly as possible, to ensure the proper healing of all the ligaments and to regain total stability of my ankle, surgery was the best choice.
“My rehabilitation starts now and I will do everything to come back stronger than ever!”