As one of four rugby-playing brothers, Tom Lucas spent his childhood going to battle against New Zealand in the backyard.

Now the sevens dynamo wants nothing more than a real-life shot at bringing down Australia's enemy at a Commonwealth Games in the cauldron of Glasgow's Ibrox Stadium.

With Queensland Reds utility Ben and NSW Waratahs back-up halfback Matt as older siblings, and promising high school player Isaac bringing up the rear, the Lucas clan has become an ever-growing rugby institution in Brisbane.

It all started on a narrow strip of grass lined by power poles at the back of the family home.

And one look at 20-year-old Tom on the sevens field, confirms he's indeed a product of his upbringing.

He's champing at the bit to give Commonwealth champions New Zealand a taste of the Lucas competitive spirit.

"Definitely. I love playing the best teams and that's where you get the thrill - beating them in big occasions," Lucas told AAP.

"That's what you want to do. Just like the backyard games.

"We would split the teams up as even as possible. The oldest and the youngest and then me and Matty.

"It was always full contact. I remember a few brawls. We always used to pretend we were Origin players or playing a Bledisloe Cup.

"Benny and mum and dad would monitor what was going out there, make sure it didn't get too fiery."

The Lucas brothers are as close as brothers get - with Tom and Matt supporting each other in their lives away from home in Sydney - where the Australian sevens and Waratahs are based.

Tom Lucas is focused on going through to the Rio Olympics with the Australian side, and believes the tenacious spirit which defies his diminutive stature suits the sevens form down to the ground.

"I've always loved to win," he said.