Juan Martin del Porto has suffered a groin strain and is a doubt for the French Open, the Argentine world number six said on Friday.
Del Porto was forced to pull out of the Italian Open in Rome on Thursday after feeling a pain in his left groin in a match against Belgian David Goffin.
"After the medical examinations today, it has been determined that I have suffered a groin strain (grade 1) in Rome," 29-year-old Del Potro said on Twitter.
"I have started to do rehab and will evaluate the situation in the upcoming days to decide whether I can play the French Open."
The injury comes at a bad time for Del Potro, who has started the season well with tournament wins in Acapulco and Indian Wells.
The French Open starts on May 27 in Paris and will be broadcast on SBS.
