Port Adelaide's players will have blood on their hands if coach Mark Williams doesn't serve out his AFL contract, defender Troy Chaplin says.

Williams' tenure is under increasing pressure amid the club's worst losing streak since entering the AFL in 1997.

Port have lost their past seven matches, and Williams last week conceded he's unlikely to be offered a new deal when his contract expires at the end of next season.

But the record losing sequence has stoked speculation Williams may not last that long.

Chaplin said he was shocked at Williams' admission that he's long odds to remain at Alberton past next season.

"He has been copping a fair bit of flack in the media, but the onus has got to be put back on the playing group," Chaplin said on Monday.

"He can only take so much responsibility, the rest of the responsibility has got to go on us.

"We have got to be able to execute the game plan and that is what we haven't been able to do ... and that has got nothing to do with him.

"We need to start playing for him and start performing because when we are not performing, he cops the brunt of it ... and nothing is said about the players.

"The players have got to take a whole lot more responsibility for the way we are playing."

Williams, coach of Port since 1999, has missed the finals in three of the past four seasons.

The 51-year-old's salary was halved when given a contract extension in the middle of last year.

Chaplin said Williams' message still resonated, but the players were currently unable to execute his plans.

"We know the game plan works because it worked at the start of the year because we executed it the way we should have," he said.

"At the moment we're just not executing it at all."

Port's plight seems set to worsen with fixtures against Collingwood, Western Bulldogs, Adelaide, Hawthorn and St Kilda in the next five weeks.

"It's going to be a challenge for us and it's going to be interesting to see how guys respond," Chaplin said.

Brought to you by AAP © 2024 AAP