But Waikato did not just shine on attack. Captain Luke Jacobson led by example and put in some crunching tackles, as did his loose forward partner Jahrome Brown. One hit by Jacobson on Otago skipper Tom Hardy was especially memorable. It wasn't all just flash and dash in the backs either. Lopeti scored his second from a perfectly executed lineout drive.
The way in which Canterbury dissected Taranaki 42-17 was quite different but no less effective or convincing. They laid on six tries to two, including a brace to wing Fraser Scott, with typical Canterbury efficiency. It was also noticeable, for those who follow First XV rugby closely, how many of the squad originate outside Canterbury. At a glance, second five Jordie Barrett, of the famous Barrett clan, is a Taranaki boy, as is halfback Logan Crowley, prop Sean Paranihi finished his schooling at St Kentigern, fullback Caleb Makene is a Napier BHS product, plus two forwards out of Wellington, prop Joel Hintz (who was sinbinned for rucking!) and loosie Jack McCormack, who scored a try, was the 2014 St Pat's Silverstream skipper and a potentially fine footballer.
Lock Hamish Dalzell was in the New Zealand Under 20s this season.
There are of course, good educational opportunities in Canterbury, with two universities in the city, but the attractions of their academy system are well documented.
Earlier in the day, North Harbour, recovered from what was variously described as food poisoning or a virus that affected their performance on opening day, defeated Manawatu 31-24 to stay in the running for fifth position, but Auckland A's disappointing tournament continued with a 34-23 loss to Wellington. Their B side is staring at last place after falling 24-19 to Bay of Plenty, and they will need to beat Heartland on Saturday to avoid that ignominy. In the Championship semifinals for the Michael Jones Trophy, Counties Manukau thrashed Southland 51-20, with Samoan Under 20s rep Jonathan Taumateine scoring 26 points, including two tries, to go to 47 points, leading all scorers.
Tasman worked had to edge Hawke's Bay 26-20 in the other semi, a cracking game.
Tasman fullback Nankivell, who played for NZ Barbarians Schools out of Christchurch BHS in 2014, scored a muscular try and set up No 8 Brendon Asomua-Goodman for Tasman's opening score. The lead had already been taken by first five TC Campbell, who sprinted 45m after his captain, lock Quinten Strange, had intercepted a loose Hawke's Bay pass.
Today sees the second day of professional development for all the players at the tournament. On the agenda this afternoon will be sessions on mental wellbeing and awareness around drugs, supplements and drug-testing procedures. All this will be useful information with which to be armed as they move into the professional rugby ranks.
You can follow the tournament at www.facebook.com/NationalUnder19s
Jock Hobbs Memorial national U19 tournament
(Owen Delany Park, Taupo)
Day two: Championship playoffs: Bay of Plenty 24 Auckland B 19, Northland 22 Heartland 16; Semifinals: Counties Manukau 51 Southland 20, Tasman 26 Hawke's Bay 20
Premiership playoffs: North Harbour 31 Manawatu 24, Wellington 34 Auckland A 23; Semifinals: Waikato 48 Otago 20, Canterbury 42 Taranaki 17