Updated Sep 16, 2015 at 6:04a ET
French Open finalist Lucie Safarova has been hospitalized in the Czech Republic with an unspecified infectious disease, and it's not clear when she may recover.
Safarova posted a message with a photo from the hospital in Brno on Facebook on Wednesday: "It's been really hard month for me. Injury and now fighting bacteria infection in hospital!"
Safarova has already qualified for the WTA Finals in Singapore in doubles with Bethanie Mattek-Sands, for winning the Australian and French Opens, and stands a good chance to qualify in singles having reached her highest ranking at No. 5.
She also hopes to lead the Czech in the Fed Cup final against Russia in November.