"Of course he'll turn up. He's not going to leave the one opportunity he's got for one on one debate at the start of the election campaign with an empty seat. His issue is not convincing Mike Hosking whether he's got the right policies for New Zealand. His issues are convincing the public that he's got them and that might be a much bigger challenge."
Mr Key said he intended to turn up to all the leader on leader debates, regardless of the hosts' political views. He said TV3's John Campbell had once said he voted Alliance. "It doesn't stop me turning up and going on Campbell Live or the debates hosted by John. When you're a political leader it's not the interviewer you have to impress, it's the people at home watching the show."
Labour is currently preparing a dossier of statements made by Hosking that were of concern and Mr Cunliffe said it was still in talks with TVNZ.
Mr Key also scotched speculation by some that National wanted the Green co-leaders involved in the debates as well, saying he believed it should remain between the two leaders aspiring to be Prime Minister.
Mr Cunliffe had also said a Rugby News cover of Mr Key in an All Blacks jersey photoshopped alongside some All Blacks was "very surprising".
He would not say if he thought it was fair. "That is a matter for the public to make up their own mind about. All I can say is I'm a passionate rugby fan, a huge All Blacks supporter and I will continue to be when I am Prime Minister."
Mr Key said he was asked to pose for a photo but had not known what they intended to do with it. "Some people love it, some people hate it. Lots of people choose to use my image or ask me to pose for things. Sometimes it's positive, sometimes it's negative."
NZ Rugby said it was shown the image the day before Rugby News printed it and had asked the magazine to make it clear that it was photoshopped and had nothing to do with NZ Rugby.