Chelsea boss Andre Villas-Boas has admitted he and every top Barclays Premier League manager would be looking over their shoulders if Jose Mourinho left Real Madrid this summer.

Villas-Boas was relaxed about a report suggesting Mourinho would be interested in returning to Stamford Bridge were the self-styled 'Special One' to cut his ties with the Spanish giants.

The Blues manager acknowledged speculation over his own position would be rife if Mourinho became available but insisted the same would apply to the likes of Sir Alex Ferguson, Roberto Mancini, Harry Redknapp, Kenny Dalglish and Arsene Wenger. Villas-Boas said: "At the moment, there is not a vacancy at this club, that is the most important thing."

Villas-Boas, who worked under Mourinho at Porto, Chelsea and Inter Milan, added: "And the Real Madrid manager is not available at the moment. He's tied to the best club in the world.

"The only thing I can say is that I have lived Jose's availability when we were out of Chelsea and we know and I know how many clubs came knocking on our doors.

"So, a manager of Jose's dimension and the number one in the world will always be an attractive target for whatever club."

Mourinho has made no secret of his desire to return to England one day.

Villas-Boas added: "Because he's a manager that makes himself available to return to his beloved England will for sure capture the interests of City, United and Chelsea and Tottenham and Liverpool and Arsenal, and so on and so forth.

"So, in that sense, we are all under pressure, from Mancini to Ferguson to me to Dalglish to Harry Redknapp and so on."