City, without a couple of key players, underlined their depth with a solid win over Keith Braithwaite's Canterbury in Saturday's opener.
Daniel Koprivcic's 16th minute long-range strike gave the home side the lead. He then turned provider for Manel Exposito who doubled City's advantage on the hour. Substitute Emiliano Tade completed the scoring a couple of minutes before fulltime by which time both teams were a man short after Luis Corrales and United Cole Peverley were sent off.
Waitakere headed to Memorial Park down on manpower but wasted little time in taking a firm grip on the game as Allan Pearce and Roy Krishna had them 2-0 after 25 minutes.
Dangerman Seule Soromon got one back three minutes later before Lovemore grabbed his first to have United handily 3-1 ahead at the break.
Two minutes into the second half Lovemore had his second and by 70 minutes the defending champions were 7-1 ahead, with Pearce scoring his second from the spot for his sixth of the season and a share of the golden boot lead with Tade and Canterbury's George Slefendorfas.
Late goals to substitute Mohammed Awad and ever-reliable Jason Hicks earned Waikato the points on the testing trip to Dunedin.
Hawkes Bay ended their home game with Team Wellington one short after captain Bill Robertson was sent off late for a second yellow card.