WEST Coast�s Nic Naitanui and Jeremy McGovern will miss this week�s Western Derby while uncertainty hovers over Fremantle pair David Mundy and Matthew Pavlich as they wait on scan results.
However Nat Fyfe should return after two weeks out with a groin injury.
Mundy and Pavlich went for scans yesterday, and Lyon admitted there was some doubt about their availability.
He said he didn�t know the nature of their injuries, but hoped they would train later in the week.
Things look good for midfielder Fyfe with Lyon saying the Dockers were �planning for him to play�.
�He�ll come back fresh, he plays a really physical game, he�s a competitive beast and he�s really excited,� Lyon said.
Lyon was also optimistic star defender Luke McPharlin would be available, despite being subbed out during the win over St Kilda on Sunday with a cork.
�If he�s right to play we�ll take the opportunity to put him in,� he said.
Rebounding defender Michael Johnson has been cleared to play, but won�t automatically slot straight back in.
�We�re in a position to make a really considered decision,� he said.
�We�re probably leaning towards playing him in the AFL but we�ve got to work our way through the week.�
Eagles coach Adam Simpson ruled a line through Naitanui, who missed Saturday�s loss to Hawthorn following the death of his mother, saying he was unsure when he would return.
Defender Jeremy McGovern is likely to miss two weeks with a hamstring injury.
The Eagles will wait until later in the week to assess Callum Sinclair�s availability and Mark LeCras will miss one week through suspension.
Defender Xavier Ellis should play despite a knock to the foot against Hawthorn.