London - Jose Mourinho will hold Chelsea owner Roman Abramovich to ransom if he is asked to return as the English Premiership club's saviour by insisting he remains the world’s best-paid manager on £12 million-a-year and demanding to bring Portuguese compatriot and Real Madrid superstar Cristiano Ronaldo with him.According to the Express website, former Chelsea boss Mourinho is high on owner Abramovich’s list of permanent replacements for the recently sacked Andre Villas-Boas.Barcelona’s Pep Guardiola is understood to be Chelsea’s dream choice, but he will have to be convinced to walk away from the Nou Camp and then talked out of the idea of taking a year off. He would also be an expensive option as he earns £9m a year at Barcelona. Mourinho is set to leave Real Madrid at the end of the season and is already stating his intention to return to the Premiership. His relationship with Abramovich has improved since his Stamford Bridge sacking in 2007, but Mourinho will not make it easy for his former employers if he is asked to return. He is the highest-paid manager in world football, earning £11.2m a year at Real Madrid - more than double what Villas-Boas was paid at Chelsea - and would want that figure bettered.But even more costly would be Mourinho’s demand to have full control of the club’s transfer policy and his desire to bring former Manchester United forward Ronaldo with him. Like Mourinho, Ronaldo has become fed up with the constant interference of Real Madrid president Florentino Perez and is unsure of his long-term future at the Bernabeu.Real paid a world-record £80m to sign Ronaldo, 27, from United and, after 96 goals in 88 games, would want at least £100m for him.