Fremantle star Adam Cerra is set to be sidelined for close to a month with a syndesmosis injury to his right ankle.

Cerra was subbed out of Fremantle's win over Adelaide on the weekend and scans subsequently confirmed the midfielder's fate.

General manger of football operations and performance at the Dockers Joe Brierty said the injury wasn't as bad as first feared.

โ€œItโ€™s a low-grade syndesmosis injury and we expect that heโ€™ll be out for around three to four weeks,โ€ Brierty said, per the club website.

โ€œHeโ€™ll be in a moon boot for a week. Next week heโ€™ll likely get out of that and commence some functionality testing and, hopefully, transition back into football from there.โ€

Cerra has been in the news lately with speculation he could be a target for Victorian cubs at season's end.

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It has been reported that while the Dockers have tabled an offer worth as much as $750,000-a-season, there is an offer just shy of that from Carlton to lure the Victorian back home.

News Limited journalist Kim Hagdorn reported recently that the Blues were prepared to offer Cerra a big money deal should he be willing to return home.

โ€œAdam Cerra is being offered something like $3 million over four seasons with Fremantle.

โ€œBut it seems as though Carlton have countered that with an offer close to $3 million โ€“ itโ€™s not as good as Fremantleโ€™s offer of $3 million โ€“ so $750,000 a year over those four years.

โ€œCarlton have Adam Cerra in their sights at about $2.7-$2.8 million for four years.

โ€œNow, that might depend on if they can wriggle a bit more if Patrick Cripps doesnโ€™t stay with Carlton for instance."

It is unclear at this stage if Cerra will re-sign at Fremantle but many believe it is a case of when not if.

Cerra joins Joel Hamling and Alex Pearce on the Fremantle injury list as the Dockers look to recover after a horrible start to 2021 on the injury front.

The Dockers will face North Melbourne this Saturday at Optus Stadium prior to matches against West Coast, Brisbane and Essendon.