"If a club like Chelsea comes looking for you, you must seriously consider the opportunity," he told the Sun newspaper.
"A chance to go to Chelsea - or any other Champions League team in England or Spain - would be hard to turn down.
"Blackburn gave me my chance and, even though it was not a big transfer fee, I trust that I have already paid them back with my commitment and goals.
"But I miss Champions League football, it means everything for any player with ambitions.
"If I end up being sold by Blackburn and they make a good profit, fantastic.
"Mourinho has coached me. We won things together and he really knows me inside out.
"If he ever were to sign me again, it would be because he knows exactly what he's getting and that I've managed to settle down in England quite quickly."