referee's assistant Peter Kirkup flagged Salomon Kalou's second half 'goal' offside to the fury of Mourinho who says he will be waiting for the linesman to call him and apologise for his decision tomorrow morning.

Chelsea had failed to break down a stubborn Rovers side until Juliano Belletti's cross was turned home by the Ivorian striker.

But referee Howard Webb, acting on Kirkup's flag, disallowed the goal - a decision which sparked anger on the touchline with Mourinho berating the fourth official Peter Walton and urging him to look at TV replays.

Mourinho appeared to have a case as Kalou looked behind the line of the ball as Belletti drilled his low cross into the six-yard box.

A fuming Mourinho said: "We scored a great goal. Only the linesman can tell us why he disallowed the goal.

"It was so obvious but I cannot understand it. If the linesman wants to explain, then maybe it would be a good thing.

"I told the linesman I would be waiting for his phone call to apologise.

"The game is over and we lost two points. I have only good things to say about my players. A team without big ammunition, without the two target strikers, Didier Drogba and Claudio Pizarro.

"A team without a top scorer like Frank Lampard and without that kind of ammunition, the team still played well against a team that fought a lot to keep a clean sheet and go home with a point.

"Blackburn are a team I respect because they fought a lot. But Chelsea were the best team, my players were brave and we scored a great goal.

"Blackburn started the game very well but Chelsea pushed them back. In the last 20 minutes, our attacking was massive."

Chelsea have failed to score in their last two games and while Mourinho admits it is not good enough, he still claimed the goal against Rovers should have stood.

"We have scored one goal in the last two matches," he maintained.

"One goal. For a team that has dominated possession in those two games, it is not enough, I agree. But both Villa and Blackburn defended very well.

"Brad Friedel made two fantastic saves today but we played well enough with a great spirit and attitude and I am sure the goals will come."

Blackburn manager Mark Hughes was delighted with a point but admitted their success was overshadowed by a serious head injury to defender Christopher Samba.

He was accidentally kicked in the head by Andriy Shevchenko late in the game and after a lengthy delay, was taken to hospital where he later regained consciousness and had planned to travel back on the plane with the first team squad.

Understandably, Hughes did not share Mourinho's version of events where Kalou's 'goal' was concerned.

Hughes said: "The goal was offside. He was only about half a yard or so, but he was offside.

"From our point of view we are happy that it was offside. It would have been difficult for us to come back into the game if we had conceded at that point. But the assistant referee immediately put his flag up and that usually means he is pretty certain himself.

"Obviously Chelsea won't be too happy with that but if you watch it again, I think you will see it is offside.

"I thought we showed some great qualities in the second half. I have sensed a different mentality in the dressing room and the qualities the group are showing at the moment enable us to come to places like Stamford Bridge and get something from a game many people would not expect you to.

"We are absolutely delighted but the one negative thing from our point of view is the injury to Chris Samba.

"We hope it is not going to be too serious. I don't know if he had come round in the dressing room but was on his way to hospital. He got a kick on the back of the head but we hope he is going to be okay."

A Chelsea spokesman later confirmed: "Chris Samba has come round at the hospital and is talking.

"It is hoped he will be well enough to travel home with the rest of the squad on the plane on Saturday evening."