Daniel Kerr lay on the turf and grabbed high up on his right hamstring, after kicking the ball out on the full in the Eagles' 23-point win over Essendon at Subiaco Oval on Friday night.

The 2007 All-Australian was in severe pain from the moment the injury occurred and had to be stretchered off the field.

But Eagles' coach John Worsfold said club medicos believed Kerr's injury wasn't as severe, although scans will determine the true extent of the damage.

"The only word I've heard is they're confident it's not as bad as a couple of the others we've seen over the last fortnight," Worsfold said.

"Looking at it, you'd think it's not a one-week hamstring but hopefully, it's not too bad.

"When I first saw it, I just thought I hope it's not as bad as some of the ones we've seen, but it looked very similar."

Essendon coach Matthew Knights put his players on notice after the 15.11 (101) to 11.12 (78) loss, which saw his side slump to a 1-3 win-loss record.

The Bombers continually turned the ball over and trailed by 52 points early in the third quarter after the Eagles, led brilliantly by Nic Naitanui, Matt Priddis, Andrew Embley and Dean Cox, piled on nine unanswered goals.

"The first thing you do at times (to address the performance) is you've got to make changes to the line-up ... and keep looking for players who can execute under the pressure," Knights said.

"AFL is a pressure game. So if you can't operate under pressure at a high level, you're not going to win consistently.

"It's definitely not good enough. We spoke after the Fremantle game and made a few changes and we just have to have a look at the vision and as a match committee select a team that will take us forward against Collingwood on Anzac Day.

"We just committed so many crimes with the basic fundamentals of the game.

"To be blunt with you, I wasn't even that impressed that we scored goals late.

"You've got to perform at your best when the game's there to be won early and we didn't do that."

Brent Prismall, Alwyn Davey and Ben Howlett were all overlooked for selection against the Eagles, while Mark McVeigh, Angus Monfries and Brett Stanton are all chances to return from injury, giving Knights plenty of options at the selection table.

West Coast midfielder Bradd Dalziell played out the match despite being stretchered off in the second term after a heavy head clash with Essendon's David Zaharakis.

Chris Masten copped a knock to the head and struggled to see out of one eye and Adam Selwood lost a tooth.

Knights said midfielder Kyle Reimers escaped serious damage to his ankle, despite it twisting awkwardly under the body of Eagles' defender Scott Selwood.

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