Barcelona vice-president Carles Vilarrubi has warned Chelsea that the return of Jose Mourinho as manager will end 'a disaster.'
Mourinho is expected to become the new Chelsea manager after leaving Real Madrid at the end of the season after three years in Spain.
But Vilarrubi believes that the return of 'The Special One' will end badly for the Blues.
"It is not good for English football. Chelsea maybe think they had a good time from him in the past," he told the Daily Telegraph. "But you will see the real Mourinho now. If he behaves like he did in Spain it will only be an unhappy relationship. A disaster. And at his age he is not going to change.
"My position is not because he was the coach of a rival. But because of who he is and what he did. His three years in Spain he only creates disagreements, arguments, there is nothing positive he brings."
Mourinho has always had a cloudy relationship with the Catalan club since leaving his role at the Nou Camp as translator for Sir Bobby Robson and an assistant to Louis van Gaal.
Whilst manager of Real Madrid, Mourinho was involved a controversial incident against rivals Barcelona when he gauged the eye of Tito Vilanova, the opponent's then-assistant manager during their Super Cup match in August 2011.
Vilarrubi has admitted that he is happy to see Mourinho leave Madrid - a view, he believes, that is shared across Spain.
"I am happy that he is leaving. And so is everyone in Spanish football," he added. "I am just glad he has gone. I am not interested in him. Go, leave, goodbye."
Mourinho managed Chelsea for three years from 2004-2007 and has been heavily linked with a return to London.
Chelsea are on the lookout for a new manager after interim manager Rafa Benitez left his position at the end of the season.
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