Jose Mourinho is on the brink of a return to Chelsea, but the Blues have been warned that the Portuguese will be a ‘disaster’ if he returns to the Premier League.Mourinho is to leave Real Madrid at the end of the season and a report claims he had already signed a contract to return to Chelsea.The seemingly imminent return of Mourinho has been warmly welcomed by the club’s fans, but Barcelona vice-president Carles Vilarrubi claims the appointment will bring "nothing positive” to the English game."It is not good for English football,” Vilarrubi is quoted as saying in the Daily Telegraph."Chelsea maybe think they had a good time from him in the past. 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.”Barcelona and Madrid are bitter rivals in Spain but Vilarrubi claims the relationship has nothing to do with his views on Mourinho."My position is not because he was the coach of a rival, but because of who he is and what he did,” Vilarrubi said. "His three years in Spain he only creates disagreements, arguments, there is nothing positive he brings."You can learn good things about life from watching people in football, or the circus, or the opera. There was nothing he brought that was good. There was no positive balance. "I cannot see anything good about him. Not one thing. In sporting terms, maybe I am not the person to ask. But in cultural terms, he was a disaster."Apart from his aggression to the coach of Barca, the ambience he creates everywhere he goes, the relations with the players, with the press are absolutely terrible. I am happy that he is leaving. And so is everyone in Spanish football.”