Donegal manager Jim McGuinness has admitted that Michael Murphy and Rory Kavanagh are doubtful starters for the Ulster SFC quarter-final clash with Derry on Saturday.
Murphy has not played since the Allianz League defeat to Dublin on 24 March and has since undergone procedure on a lateral knee ligament injury.
Kavanagh is receiving intensive treatment on an ankle injury picked up in a club game just over two weeks ago.
Apart from the above duo, McGuinness has a fully-fit squad to pick from for the game in Ballybofey.
Speaking to the Democrat/People's Press, the Donegal manager said: "Michael's rehab has not progressed as well as we would have liked and he is a good bit behind in his preparation and fitness and it is certainly not the ideal situation.
"But we are going to wait and see how he goes this week.
"Rory has not trained for the past two weeks and it is also matter of waiting and seeing with him too. The consultant in Dublin told him he was in with a chance of playing if he stuck strictly to the rehab."