MELBOURNE'S glaring drop-offs continue to frustrate coach Paul Roos, who described Saturday's 61-point loss to Port Adelaide as "concerning". 

The Demons led by as much as 24 points at the six-minute mark of the second quarter at TIO Traeger Park Oval in Alice Springs, but fell away badly in the second half as they allowed the Power to kick 10 of the last 12 goals after the major break.

"The disappointing thing for me is when we drop off, we drop off really dramatically," Roos said after Saturday's game.

"We believe from an effort point of view we should demand effort for 120 minutes, and if we give effort for 120 minutes, we'll still get beaten by some of the better teams.

"It really gets back to when players go away from the team it manifests in a lot of different areas.

"When our guys start thinking about themselves, it affects everyone in the team."

The Demons laid just 57 tackles against the Power, well below their season benchmark of 88 in the club's 38-point win over the Western Bulldogs last Sunday.

Roos said his team had allowed itself to become "disjointed".

"I think it (the capitulation) demonstrates the difference between our good and our bad," Roos said.

"Our good is very good and our bad is still far too disjointed, where we stop playing as a team."

Roos found it difficult to name many influential players from his side, although he thought defender Colin Garland was "exceptional".

Young midfielder Angus Brayshaw had 21 disposals, eight tackles and five clearances in his finest performance for the club to date. 

The Demons now have nine days to digest their loss before a showpiece fixture against Collingwood on Queen's Birthday awaiting.

Midfielder Dom Tyson is every chance to return to bolster an midfield that lacked depth against the Power, although key forward Chris Dawes will miss another week as he battles a niggling calf complaint. 

The Demons are also missing Dean Kent (hamstring), Jay Kennedy-Harris (groin) and Christian Salem (hamstring) from its preferred line-up.

"We're probably five or six down from our best team," Roos said. 

"We probably don't have the depth of the top spots. We need everyone back on deck and we need them playing well, but it doesn't take away the disappointment of today and how poor our performance was after half-time."