![Long comeback: Petra Kvitova.](/web/20161222052245im_/http://www.theage.com.au/content/dam/images/g/t/f/i/y/g/image.related.wideLandscape.460x259.gtg7v0.png/1482354855449.jpg)
Kvitova out for six months after stabbing
Two-time Wimbledon tennis champion Petra Kvitova faces around six months out of the sport while her playing hand, wounded in a knife attack, recovers its strength, the surgeon who operated on her said on Wednesday.