The former winger, who holds the record for the most tries at the World Cup, will be cheering on the All Blacks at Eden Park along with his wife and two sons soaking in the "experience of a lifetime".
However, Lomu, who is of Tongan descent, says it would have been a more painful experience if he watched the game with his parents.
"I know Dad will be supporting the Tongan boys and Mum will be supporting the All Blacks with myself. If I'm sitting in the middle I think I could be black and blue," the 63-test All Black said.
Lomu scored two tries in New Zealand's opening game against Tonga at the 2003 World Cup and, like many, predicts a physical first-up encounter for the All Blacks.
"I expect it to be physical, that's one thing the Tongans will bring."
As seen by the 7000 fans who greeted the Tongan side at Auckland Airport on Monday, Lomu said there would strong support for all the Pacific nations throughout the tournament.