Be it on the court, pitch, field or anything in between adding that sibling rivalry - the chance to go off the chain, and go all-out without the risk of one crying foul to mum and dad - it sparks.

This weekend, a spark of sibling rivalry will be added to the tinderbox which is the Orange Netball Association Toyota Cup grand final when Orange High's Megan Eslick takes on older sister Kate, lining up in Orange City Craig Harvey Mechanical gear.

Not only will the two sides clash with each other, but the sisters are a big chance to line up on each other, with Megan normally a wing defence or goal defence, compared to Kate in wing or goal attack.

"We're very competitive, especially with each other," Kate said.

"When I was growing up and playing representative netball I'd always drag Megan out to defend against me when I was practising shooting and she'd have to stand on a chair out to defend."

This year is the first time the pair have lined up on the court, and while you'd expect a bit of argy-bargy, Kate shrugged when asked about her sister's efforts to get under her skin.

"She tries," Kate said. "It's interesting."

This will be Kate's second grand final after lining up in City's victory last year - the side's 12^th in a row - but she's not "definitely not" passing any advice onto her sister ahead of her division one grand final debut.

"It was an unreal experience. The atmosphere - obviously it's going to be different this year but it is phenomenal, it's next level," she said.

The 2020 decider will indeed be different - as all things this year have been.

Just one spectator per player will be allowed in, which - fortunately for the Eslicks - means both parents can come and watch Megan and Kate line up against each other, even if they'll apparently both sit on the fence and refuse to support one team over another.

Megan said she was "a bit nervous, but mostly excited" ahead of lining up on her sister in the grand final.

"I've always looked up to her so playing against her is just an amazing opportunity and she's always there to support me so to have this chance it awesome," she said.

"There's a few nerves but we go out there and give it out best shot and play the four quarters and give it our all we should be good."

The two sides have had a lot to do with each other in 2020, playing scratch matches at training for much of the season and generally learning off each other.

"We'll be able to come together and use our competitiveness against each other and use what we've learned," Megan said.

"It's like one big family."

Kate concurred.

"The hornets girls are an unreal bunch of girls, both on and off the court and their talent is across the board. Seeing them at training and playing against them in a grand final is going to be cool," she said.

Does it mean they're going to go easier on each other?

"Absolutely not."