Ross Lyon has painted himself as unsackable at the end of this season, saying he could "guarantee" he would remain in the job to serve the final year of his contract in 2020.

Lyon has come under renewed pressure following a shock loss to Carlton and a 91-point flogging from West Coast in the past fortnight and the 11th-placed Dockers could drop as low as 14th if they lose to Hawthorn in Launceston on Saturday.

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"I can guarantee you I'll be around (next year). My performance dictates (I'll) be around," he said.

"We're a rebuilding team. We're 7-8. Three weeks ago I was being lauded. So I never fell for it then and I'm not falling for it now.

"We're clearly on track and building a great platform and we'll only get better again next year. We've been in every game. No one can stand here and tell me we couldn't have won every game we've been in (until the derby).

"It was the first game (we haven't been in). If we don't measure it on the body of work, it's nonsensical and it is hysterical. But I just do my job. I find that's stood me in pretty good stead."

Lyon said he was comfortable going into next year without receiving an extension.

"Yeah because that's the plan. I've never asked for an extension," he said.

Asked whether there had been an overreaction to Fremantle's derby drubbing, Lyon said: "It's not for me to judge. It's up to you (the media) to decide what our body if work's been like for the year and what one performance means.

"Everyone's put different weightings on it. I'm not here to really comment, and never have, on commentary. Whether it's from fanzine sites or media. That's not my job. We love the interest in the game.

"When you put yourself up to be in AFL footy, you put yourself up for criticism. That's just part of the business. You've just got to focus on what you can control and that's preparation and performance and it's the only way you survive, in any industry, for along period of time."

Lyon laughed off a petition calling for his sacking.

"I'm not sure how many numbers are relevant. I've heard the noise. I think it's just hyperbole," he said.

"I think my wife has a look and says: "you know, most of them are West Coast supporters". I'm here to focus on what I can control."