Real Madrid coach Jose Mourinho lashed out at referee Howard Webb after his side were denied a place in the Champions League final by Borussia Dortmund on Tuesday.

Madrid came within a whisker of pulling off a remarkable comeback after losing their semifinal first leg 4-1 in Germany last week but came up just short with a 2-0 win at the Bernabeu to exit 4-3 on aggregate.

Mourinho, who knows Webb well from his days as Chelsea manager, said the official should have dismissed Dortmund's Mats Hummels for handball in the second half and accused him of not doing so to allow the centre back to play in next month's final.

"It's incredible and I continue to say the same that he is a fantastic referee," Mourinho told Spanish television.

"But it's incredible that he didn't give Hummels a red card," added the outspoken Portuguese, who is a regular critic of match officials and has clashed several times with soccer authorities.

"I have spoken to Webb already and he didn't give Mats Hummels a red card so that Mats Hummels can play in the final.

"There were 18 minutes left in the match. I come to the conclusion that in the end Webb is as good a referee as he is a person, with a big heart.

"Because he let a player off a red card to the detriment of the other team."

Dortmund will play Bayern Munich or Barcelona, who meet on Wednesday with Bayern holding a 4-0 advantage from the first leg, in the May 25 final at London's Wembley stadium.