In Napier, a double by Sean Lovemore guided Hawke's Bay United to a 4-2 win over YoungHeart Manawatu to leave the Chris Greatholder-coached outfit second on the table. Stephen Hoyle opened the scoring with just six minutes on the clock before former All White midfielder Cole Peverley doubled the lead in the 21st minute.
Lovemore heaped further misery on the visitors with the home side's third two minutes into time added on in the first half before notching his second and Bay's fourth within sixty seconds of the restart.
Lovemore's four goals for the season leave him joint top of the Golden Boot table with Tom Mosquera, who alongside substitute Lewis Cumber, scored once each for the visitors to set up a nervy finish for the home team. Manawatu still lie fourth on the table, with a superior goal difference keeping them in the top four ahead of Canterbury.
Waitakere United move up to third place on the table with their second win of the season, despite a dour performance in a 1-0 win over Waikato FC at Whenuapai.
David Mulligan played the role of hero for the defending champions, scoring the only goal of the game from the penalty spot after Rory Turner was adjudged to have handled the ball in the 66th minute. Waikato FC's best chance was a Ryan Thomas lob that hit the underside of the crossbar late in the first half.
Next Sunday, Auckland can maintain their playoff charge at home to Hawke's Bay in a mouth-watering showdown between two sides with 100% records, while Waitakere - the premiership's other team with a 100% record - travels to YoungHeart Manawatu.
Sunday's other fixtures see Team Wellington take on Waikato FC at Porritt Stadium in Hamilton, while the match of the round is the South Island derby between Canterbury United and Otago United at ASB Football Park in Christchurch.