Chelsea skipper John Terry will be available for Saturday's clash with Charlton but the club is still waiting for news on Ashley Cole's knee injury.
Terry has been out since December 13 with a back injury that required surgery with the England defender's rehabilitation then being complicated by a calf problem.
The Blues' form has suffered without Terry but Mourinho this afternoon revealed he will be in the squad to face Charlton at The Valley.
'John Terry is an important player for us. We've missed him and he's been out for a long, long time,' he said.
'It's important he's back, especially in a period when we keep losing players.
'We lose some players, we then gain some players and it's important he's available.'
Chelsea face an anxious wait for news on Cole's knee injury with the England left-back due to undergo a scan this afternoon.
Cole was stretchered off with suspected knee ligament damage in the second half of last night's 3-0 victory over Blackburn.
The former Arsenal defender trapped his studs in the turf as he attempted to control the ball and went down in agony clutching his left knee.
It is feared Cole could be sidelined for the rest of the season - he will almost certainly miss next week's international against Spain - and Mourinho fears the worst.
The Portuguese said: 'There is no news on Cole yet. He will have his scan and at this moment it doesn't look very good.
'We have to wait. That's all we can do at the moment.'