"Petra Kvitova was attacked in her flat this morning, it was a random crime, nobody was going to attack or rob her as Petra Kvitova," spokesman Karel Tejkal told AFP.
"She was injured with a knife during the attempted burglary. Her life is not in danger, she is being treated by doctors," Tejkal added.
The Dnes daily said she had cuts on her left hand.
Tejkal said the burglar was still at large.
The world number 11 was hoping to start next year at Sydney on January 8 to warm up for the Australian Open from January 16.
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