Keano Kini scored New Zealand's opening and closing tries, gaining 260 run metres and beating seven tackles in the Kiwis' 78-0 defeat of Fiji.
The 13-try victory at Cbus Super Stadium on Saturday secured a semi-final place and strengthened New Zealand's bid for its first World Cup title since 2008.
Casey McLean scored four tries, taking his total to 15 in seven Tests, while halfback Jahrome Hughes supplied three try assists.
New Zealand led 48-0 at halftime, after Fiji lost Api Koroisau to a jaw injury and Semi Valemei to a head knock.
The match turned volatile in the 52nd minute when winger Ronaldo Mulitalo made high contact with Ronald Philitoga, who could not return.
Fiji halfback Brandon Wakeham confronted Mulitalo and threw a punch; both players were sent off, leaving each team with 12 men.
Mulitalo now faces a wait for Sunday's judiciary charges, while the Kiwis continued scoring five more tries.
Captain James Fisher-Harris scored his first Test try since the 2023 Pacific Championships against Samoa.
New Zealand could regain Kalyn Ponga for next week's knockout stage. The Knights fullback broke his arm against Australia on October 15, but has worked on his rehabilitation.