Prague: A Czech court said on Wednesday it had raised the prison term for the man who had attacked two-time Wimbledon champion Petra Kvitova with a knife at her Czech home to 11 years from a previous eight.

"We have changed the crime classification from serious battery to a serious case of burglary with a longer prison term," said Stanislav Cik, spokesman for the High Court in the eastern city of Olomouc.