FREMANTLE coach Ross Lyon says the club has asked the AFL to look at some “grey areas” on Aaron Sandilands’ suspension.

The Dockers’ big man won’t face Western Bulldogs in Round 1 after copping a one-match ban for his bump on Richmond’s Ben Griffiths during Friday’s NAB Challenge win in Mandurah.

It is the first time in the reigning Doig Medallist’s 239-game career that he’ll serve a suspension.

Lyon voiced his disappointment about Match Review Panel’s decision, but felt the risk of losing Sandilands for two games was too great to challenge.

“We’re disappointed. We felt we had the moral high ground really,” Lyon said.

“Clearly we’ve asked the AFL to look into it. There’s some grey areas with third-up in ruck contests.

“But we’re all big boys and we move on and focus on this session and this game down at Mount Barker against Adelaide.”

While Sandilands is free to face the Crows in his former home town on Sunday, new skipper David Mundy is no certainty to play due to a groin injury.

Lyon said Mundy was still a bit sore, but was hopeful of getting him up.

Friday’s impressive debutant Darcy Tucker has been ruled out with a knee injury.

Tucker, who was one of the Dockers’ best against the Tigers with 21 touches across the half-back line, is in Melbourne getting his injury checked out.

“We were thrilled with him, but he’s had a bit of a hiccup,” Lyon said.

“He’s currently in Melbourne just getting his knee checked out.

“Hopefully it’s not too serious, but that would rule him out already for this week.”

Camera Icon Aaron Sandilands copped a one-match ban for his bump on Richmond’s Ben Griffiths during Friday’s NAB Challenge win in Mandurah. Credit: Getty Images, Daniel Carson/AFL Media/Getty Images

Former Gold Coast Sun Harley Bennell and key defender Alex Pearce both look set to play in Freo’s final NAB Challenge match against Geelong at Subiaco Oval on March 12.

“That’s the plan,” Lyon said.

Small forward Hayden Ballantyne is likely to miss the rest of the pre-season tournament with a minor hamstring strain, but Lyon is confident of getting him back for the start of the home-and-away season.

Ballantyne received an official warning from the AFL this week after he was caught using a mobile phone during Friday’s game.