Chelsea manager Jose Mourinho has insisted that he is "not worried" by the prospect of facing Manchester United on the weekend without strikers Diego Costa and Loic Remy.

Costa has been struggling with a hamstring injury of late, and is not expected to feature against the Red Devils at Old Trafford.

Meanwhile, the Spanish international's replacement in the Blues' starting lineup, Remy, had to leave the field after 16 minutes of the 6-0 win over Maribor last night with a groin injury which could see him miss the next "couple of weeks".

Despite the double injury blow, Mourinho remains confident that another player can step up if called upon.

"I don't know the dimension and I'm not worried," FIFA.com quotes the Portuguese as saying. "When a player is injured, play another one.

"Tomorrow is a day off and the doctor is forbidden to call me to speak about injuries. I don't want to speak about injuries, Man United. I don't want to know. We don't cry on injuries. It's our philosophy, we don't cry. We just think one injury means an opportunity for somebody else.

"We cannot hide. In this moment we have some problems with players that are not available to play. We will prepare the game Thursday, Friday, Saturday to try to be at our best possible level against an opponent which we respect very, very much."

Chelsea are currently top of the Premier League table.