Meanwhile, Auckland kept their chances alive with a gutsy display in defeating one of the favourites, Aorangi, 3-2 in what could prove a decisive contest.
Auckland, the most successful team in the history of the event, are looking for their first win in the championship since 2003.
Bay of Plenty edged 2006 champions Manawatu-Wanganui (3-2) to stay in the hunt, going back-to-back after they halved with North Harbour.
The team from the Bay are in fourth place with two wins and a half and 9.5 individual points.
• The Freyberg Masters is a unique round-robin format where teams play eight of the 14 districts, with the team who gather the most points crowned the champions tomorrow afternoon.
Leaderboard
After Round 4 (team points, individual): Northland: 3, 12; Canterbury: 3, 11; Auckland: 3, 10.5; Bay of Plenty: 2.5, 9.5; Aorangi: 2, 10; Taranaki: 2, 9.5; Manawatu-Wanganui: 2, 8.5; Hawke's Bay: 1.5, 10; Waikato: 1.5, 9; North Harbour: 1.5, 9; Otago: 1.5, 6; Wellington: 1, 9; Southland: 1.5, 5; Tasman: 0.5, 7; Poverty Bay East Coast: 0, 3.