The National Party leader says he will not apologise to freelancer Bradley Ambrose over comments he made about the cameraman's ethics and professional conduct.
John Key has laid a complaint with police over what he says was an illegal recording of a private conversation between himself and ACT Party candidate John Banks at an Auckland cafe on 11 November.
The politicians met over a cup of tea at the cafe, widely viewed as a signal to National supporters that they should vote for Mr Banks in the Epsom electorate.
Media were told of the meeting beforehand.
Mr Ambrose is seeking clarification in the High Court on Tuesday as to whether the conversation was, in fact, private.
John Key says he would not have laid the complaint if he thought that the discussion was public.
Mr Key says he will not apologise for comments he made about Mr Ambrose, whose microphone recorded the meeting, and says the cameraman has recourse through the courts.