- Petra Kvitova has regained the use of her racquet hand badly injured three months ago in a knife attack but there is still no date for her return to tennis, her spokesman said. The two-time Wimbledon champion suffered severe injuries to her left hand as she fought off a knife-wielding intruder at her home in the eastern Czech town of Prostejov in December. The 27-year-old underwent emergency surgery, enduring a four-hour operation to repair tendon and nerve damage. "Petra uses her hand without problem for daily activities," spokesman Karel Tejkal told AFP, saying she had been keeping up her fitness. "Of course, the hand is weakened but at first glance you can't see that she was injured. At the moment no one can give a concrete date," said the spokesman.