But he admits his season could be defined in the coming weeks.
Fergie said: "We are involved in three competitions and it's great, but the next couple of weeks are crucial for us.
"If we can get the players back it will enhance our chances. But Saturday is a big one because we are depleted.
"The players have been remarkable up to now. They've had a fantastic attitude to games, given everything.
"We must have a chance but it's more difficult than it's ever been."