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Tennis star Petra Kvitova injured by knife-wielding attacker at her home

FILE - In this May 27, 2016 file photo, Petra Kvitova of the Czech Republic serves in her third round match of the French Open tennis tournament against Shelby Rogers of the U.S. at the Roland Garros stadium in Paris.

FILE - In this May 27, 2016 file photo, Petra Kvitova of the Czech Republic serves in her third round match of the French Open tennis tournament against Shelby Rogers of the U.S. at the Roland Garros stadium in Paris.  (Copyright 2016 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistribu)

 Two-time Wimbledon champion Petra Kvitova was injured by a knife-wielding attacker at her home on Tuesday.

The 2011 and 2014 Wimbledon champion said the injury to her left hand was "severe."

"In my attempt to defend myself, I was badly injured on my left hand. I am shaken, but fortunate to be alive," Kvitova, who is left-handed, wrote on Twitter. "The injury is severe and I will need to see specialists, but if you know anything about me I am strong and I will fight this."

It was not immediately clear how the injury could affect Kvitova's play. Details of her injury were expected to be released later Tuesday.

"What happened to me was certainly not pleasant, but it's behind me," Kvitova said in an earlier statement on the Facebook page of the Czech Republic's Fed Cup team. "I have the best possible care and I'm in touch with my loved ones. The worst is behind me."

Kvitova's spokesman, Karel Tejkal, said the incident, which he described as a burglary, occurred Tuesday morning in the eastern Czech town of Prostejov.

Prostejov police spokesman Frantisek Korinek said the attacker, a man who is about 35 years old, escaped from the scene and was at large. He said police have launched a manhunt.

Kvitova was scheduled to participate in a charity event in the city of Brno on Tuesday with another Czech player, Lucie Safarova.

"It's horrible," Safarova told Czech public radio. "Things like that are shocking to all of us. It can happen to anyone of us. That's really terrible."

In April 1993, Monica Seles was at the height of her success when she was stabbed in the back during a changeover at a tournament in Hamburg. A man reached over a courtside railing and knifed her, leaving an inch-deep slit between her shoulder blades.

Seles returned to the game 27 months later and reached the 1995 U.S. Open final.

In an unrelated move earlier Tuesday, Kvitova withdrew from the Czech Republic team at next month's Hopman Cup mixed-team tennis tournament because of an earlier foot injury.