Two-time Wimbledon champion Petra Kvitova was injured after an attack by a knife-wielding burglar at her home in the eastern Czech town of Prostejov today. Her spokesman said, her life is not in danger. The 26-year-old Czech tennis star, the Wimbledon champion in 2011 and 2014, is also recovering from a fatigue fracture on her foot which has ruled her out of the Hopman Cup starting on January 1.