Joe Daniher, son of Essendon and Sydney Swans player Anthony Daniher, was best on ground for Vic Metro in its loss to South Australia, while Jack Viney, son of Melbourne's Todd Viney, was a standout for SA.
Daniher Snr played 115 games with South Melbourne/Sydney Swans and 118 games for Essendon, meaning Joe, like brother Darcy, can be claimed by either club under the father-son rule. He could also choose to go to neither, as Marc Murphy - who was father-son qualified for Brisbane Lions - chose to do when he went into the draft and was selected by Carlton with the number one pick in the 2005 draft.
Viney Snr was skipper at the Demons for two years, and played 233 games over 13 years.
The championships feature two new teams, with the World XVIII and the South Pacific sides both playing for the first time.
Both Victorian teams - which did so well in the U18 championships that wrapped up last week - were beaten, with South Australia, which was the runner-up to Vic Country in the U18s, recorded a strong win over Vic Metro.
Western Australia 15.11 (101) def Vic Country 8.9 (57)
Goals
WA: Alex Riiel 4, Martin Geraghty 3, Dayle Garlett 2, Corey Chalmers 2, Chris Warrell, Dean Kent, Marco Paparone, Chris Yarren
Vic Country: Lachie Whitfield 2, Corie Intveen, Jake Stringer, Brad Crouch, Oliver Wines, Jason Pongracic, Jayden Gee
Best
WA: Brendon Lim, Sean Lynch, Chris Yarren, Mason Shaw, Corey Chalmers, Martin Geraghty, Brant Colledge, Dean Kent, Alex Riiel
Vic Country: Nathan Wright, Lachie Whitfield, Jason Pongracic, Brad Crouch, Billy Rolfe, Brody Mahoney
South Australia 16.14 (110) def Vic Metro 14.7 (91)
Goals
SA: Ben Kennedy 5, Jack Viney 3, Travis Schiller, Billy Hayes, Michael McMahon, Sam Mayes, Alex Spina, Troy Menzel, Todd McKay, Tom Whittlesea
Vic Metro: Joe Daniher 5, Rory Atkins 2, Nathan Hrovat 2, Kristian Jaksch, Anthony Bonaddio, Darcy Bailey, Anthony Piva
Best
SA: Jack Viney, Ben Kennedy, Brodie Grundy, Nick Amato, Joseph Sinor, Harley Montgomery, Chris Black
Vic Metro: Joe Daniher, Jonathan O'Rourke, Fabian Brancatisano, Nick Vlastuin, Keenan Posar
South Pacific 7.12 (54) def World XVIII 3.4 (22)
Goals
South Pacific: Slim Collins 3, John Ikupu 2, Aviata Siuta
World: Peter Ajang, Prince Nematswerani, Joseph Lo Buluk
Best
South Pacific: Dylan Wolfgramm, Slim Collins, Yoshi Harris, Liam Ackland, Wingti Pena, John Ikupu, Theo Gavura
World: Kane Clark, Emmanuel Irra, Jono Elliot, Mathias Biron, Alex McPhee, Sean O'Kennedy, Joseph Lo Buluk
Tasmania 13.11 (89) def Northern Territory 10.11 (71)
Goals
Tasmania: Brennon Kendall 2, Sam Siggins 2, Bryden Goninon 2, Kyle Clark, Joby Reynolds, Cory Dyson, Jesse Lonergan, Matthew Ling, Jarrod Hibberd, Bayden Bryant
NT: Anthony Gugliotto 2, Joel Seden 2, David Richardson, Jed Anderson, Louis Eggar, Jake Neade, Matthew Duffy, Sam Autio
Best
Tasmania: Henry Schade, Jarrod Hibberd, Calen Jeffery, Bryden Goninon, Chae Evans, Sam Siggins, Matthew Ling
NT: Jordan Wilson, Jed Anderson, Joel Seden, Matthew Duffy, Jack Long, Braedon McClean
Queensland 19.14 (128) def NSW/ACT 8.10 (58)
Goals
Queensland: Shaun Crook 7, Alex Sexton 3, Nathan Newcastle 2, James Ives, Andrew Boston, Josh Smith, Nabako Stow, Tom Overington, Ryan Johnson, Jordan Burke
NSW/ACT: Stephen Wray 3, Zachary Williams, Daniel Robinson, James Mount, Curtis Slattery, Craig Moller
Best
Queensland: Alex Sexton, Andrew Boston, Tom Overington, Shaun Crook, Jock Oats, James Ives
NSW/ACT: Craig Moller, Daniel Robinson, Lachlan Harper, Angus Locke, Zachary Williams, Dean Robertson
Round two matches to be played Tuesday, July 6 at Blacktown Olympic Park:
3.30pm: Western Australia v South Australia
6pm: Vic Metro v Vic Country
