Green Island performed the Houdini act at Miller Park, scoring two tries in the last three minutes to beat Alhambra-Union by a point.
Loose forward Mika Mafi gave a dynamic display to help Green Island beat Zingari-Richmond and retain the Hellyer Memorial Trophy at Montecillo.
Green Island took on University A in a Dunedin Premier Rugby match at Miller Park on Saturday, in conditions described as ''far from ideal''.
Loose forwards Josh Beer and Mika Mafi capitalised on some solid work from the tight five to lead Green Island to its first win over University A since 2002.
Green Island finished the stronger to gain a surprise but deserved bonus-point win over Harbour at Watson Park.
The powerful Southern machine continued its domination yesterday and remains unbeaten after five rounds of the Dunedin premier competition.
Green Island will be rueing the absence of an accurate goal-kicker after it allowed Taieri to stumble to a 14-12 victory at Miller Park and retain the Bezett Trophy and Robb Cup.
Glenn Dickson's accurate kicking helped Pirates to a solid 29-18 win against Green Island on the first day of club rugby on Saturday.
Zingari-Richmond was competitive for 40 minutes but numerous holes opened up in its defence in the second spell at Miller Park.
Captain Cameron Rutherford was a controlling influence and his accurate goal-kicking was invaluable as Kaikorai staved off a spirited challenge from Green Island at Bishopscourt.
Dunedin dominated the second spell and scored three more tries when it beat Green Island at Kettle Park.
Midfield back Andrew Parata was able to break the advantage line and played a key role in University A's six-try win over Green Island at the University Oval.
Green Island applied pressure from the start and gave the more fancied Southern a fright with a draw at Miller Park.
Luke Reihana contributed 20 points and played a fine all-round game as Alhambra-Union comfortably beat Green Island at the North Ground.
A polished Taieri team scored seven tries to dominate the game and outclass Green Island at Miller Park.
Powerful centre Siaosi Folau was in blockbusting form as Harbour comprehensively beat Green Island at windswept Watson Park.
Alhambra-Union dominated all facets of play to run away with a 10-try win over Green Island at Miller Park.
Loose forwards Jason Bint and Brendon Hamilton and prop Jason Short played key roles in Green Island's win over Clutha Valley at Miller Park.
Lawrence scored three tries in the second half to beat Green Island in the Metro-Country competition on Saturday.
Prop Brad Gilmour and flanker Jeremy Corliss played dominant roles as Taieri took the lead midway through the second spell to beat Green Island at Tahuna Park.