ADAM Simpson admits West Coast's fitness and speed are concerns but concedes those problems can't be fixed while the Eagles scrap to play finals.

However, the under-fire coach believes the Eagles can improve their method to avoid costly final-quarter fadeouts and is adamant he is "up for the fight" with five rounds to go.

The Eagles slipped to ninth on the ladder after Sunday's final-quarter meltdown against Collingwood, leaving Simpson searching for answers.

Apart from blowout losses to Hawthorn and Essendon, West Coast has been in every match heading into the final term but only has a 9-8 win-loss record.

"There's a real concern about how we're finishing off games and anyone we play knows that," Simpson said.

"Work rate, speed, fitness, method – all those things aren't a concern until later in games. 

"The GPS would suggest that there's been drop-offs in our last quarters.

"Some of the things I don't think we can fix this year in regards to fitness and speed, but some we can really work on.

"We're looking at everything, we really are, and the one thing we can get right is our effort.

"We've got to get the balance right and play a team that's willing to fight for four quarters." 

After the siren: Meltdown torches Eagles' credibility

David King called for Mark LeCras to never play again after the Pies defeat, but Simpson refused to fire back at his former North Melbourne premiership teammate.

"They're irrelevant to me what David says about my players," he said.

"The ball is in Lecca's court."