TRAVIS Varcoe's sister is fighting for life in an Adelaide hospital after she collapsed as a result of a head knock in a suburban football game in South Australia.

Varcoe is set to return to Victoria on Wednesday after flying to Adelaide to be by his sister's side and be closer to family.

His 27-year-old sister collided with a teammate and an opponent during the Grand Final between her Angle Vale Football Club and Mount Lofty on Sunday.

Magpies football manager Geoff Walsh said the club would offer Varcoe all the support he needs.

"It was an unfortunate accident in a football match at the weekend," Walsh told Macquarie Sports Radio.

"His sister suffered an injury and right now she's in a pretty grave condition.

"Our thoughts are with Trav and his family, and we're hoping she pulls through."

Walsh said it was still too early to make a call on Varcoe's availability for the Magpies' qualifying final against West Coast at Optus Stadium on Saturday week.

"He went back to Adelaide to be by his sister's side and other family members, so he's coming back to Melbourne sometime today (Wednesday) and we'll just see how that progresses," Walsh said.