As Google and Microsoft again head to court on Tuesday in the case of former Microsoft executive Kai-Fu Lee's defection to Google, documents filed in the case allege that Microsoft CEO Steve Ballmer vowed, "I'm going to f—ing kill Google," according to an AAP story in the Sydney Morning Herald (via Slashdot). A declaration by former Microsoft engineer, Mark Lucovsky, who told Ballmer in November that he was leaving to go to work for Google, alleges that the Microsoft CEO picked up his chair and threw it across his office, then berated Google CEO Eric Schmidt.

"I'm going to f—ing bury that guy, I have done it before, and I will do it again. I'm going to f—ing kill Google," Ballmer is quoted as having said.

Schmidt was once a top executive at Sun Microsystems and Novell, companies that Microsoft once tangled with. In a statement, Ballmer described Lucovsky's allegation as a "gross exaggeration. Mark's decision to leave was disappointing and I urged him strongly to change his mind. But his characterization of that meeting is not accurate."

Microsoft is planning to ask Washington State's King County Superior Court Judge Steven Gonzalez on Tuesday to extend his order barring Lee from working for Google - until the trial starts in January. In late July, Gonzalez issued a temporary restraining order barring Lee from starting his work for Google.

Also according to other papers filed in the case, Jonathan Rosenberg, Google's director of business development, suggested in an email that Google pursue Lee "like wolves." Lee was hired to oversee a research and development center that Google plans to open in China. Lee started at Google the day after he resigned from Microsoft.