The talented siblings made their Hampden league senior debuts - Oliver in senior football and Poppy in open netball - at ages most teenagers can only dream about.

Oliver, 15, played his first senior match in June and has added two more since while Poppy, 13, took to the court for a quarter before the most recent coronavirus lockdown stalled the season.

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The Emmanuel College students - Poppy is in year seven and Oliver year nine - were grateful for the opportunity to test themselves.

"We have worked pretty hard for it; it's something we've always wanted to do," Oliver said.

Oliver, who plays in the midfield or on a wing, made his senior football debut without a crowd against Koroit.

He hopes it's just the beginning of a long career in purple and gold after harbouring a dream to play for his home-town club from a young age.

He lives next to Gardens Oval.

"Me and Oscar Pollock, who is another under 16 who's played seniors this year, are aiming to play a bit more seniors next year to get our confidence up," Oliver said.

Poppy was thrown into goal attack on debut. It was a big step up from her regular 13 and under competition.

"I shot two goals and everyone was really supportive and (coach) Renae (Taylor) was the most supportive," she said.

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She will start on the bench against Terang Mortlake on Saturday, eager to get another chance in the top-grade team.

"Hopefully I'll see the girls win because they've had a close game against Terang before," Poppy said.

"Even just to sit there and see them play is pretty cool."

Oliver will turn his attention to the Seagulls' under 16 finals campaign on Sunday.

The five-team finals format has been tweaked for the 2021 season due to COVID-19 lockdowns impacting the schedule.

It will be a two-week series with both semi-final winners to progress to the grand final on Sunday, August 22.

Oliver said Port Fairy was determined to do the club proud against Hamilton Kangaroos in their semi-final clash at Terang Recreation Reserve.

"It would be huge. We have got a great team and a great coach (in Craig Fraser)," he said.

Poppy is eager to finish the season strongly in the 13 and under competition, which has two more home-and-away rounds to play, too.

"We work well as a team. We're not too far up there on the ladder but we improve every week and that is the whole point," she said.

Oliver and Poppy love sport. Both play basketball for Warrnambool's representative programs.

Oliver is a strong long-distance runner and Poppy prefers to sprint.

Younger sister Lola might be following in her older siblings' footsteps.

"She is eight and she is starting basketball," Poppy said.

Oliver described her as "pretty competitive".

"Almost too competitive," Poppy joked of their little sister.