Mourinho declared: "Of course I am alarmed. I am not happy.
"We cannot score goals and secondly I have no good news from the medical department. So I have to fight with these players to make the team the best possible.
"I am disappointed but the history of the game was simple - we had 20 chances and scored one goal. So maybe we need 40 chances to score two and 60 to score three.
"Our 20 chances were not enough to score two goals. It is not my strikers, it is my team. My team played against a team that in my opinion did its game. Like smaller teams do when they visit the better teams. They come here to defend and are organised.
Mourinho admits that qualifying for the knockout phase will have been made harder by their draw.
He added: "This was the kind of game you have to win. The kind of game you have to win at home against the weakest team in the group. So it is not a good result.
"But we are not scared of the situation in the Champions League. Maybe it is now more difficult to be first and maybe we need four points against Valencia.
"I don't think it is a drama - for me the drama is that in the last three matches we have dominated games but scored just one single goal.
"Our defence conceded a goal from a set-piece where every player knows his responsibility. Somebody made a mistake but I am not going to tell you who.
"We could not score two goals in 20 chances and could not defend one single free-kick."