The 50-year-old - who joined Chelsea for a second time on June 3 - discussed the club's transfer activity while on their tour of Asia and made it clear he will not welcome bids for any member of his squad.

"The one who sells has to go and buy, then they have to buy to replace, so no club is safe. Until the last minute, a club can go there and 'steal' a player," the Portuguese said. 

"I don't mean steal a player, but steal the balance that a manager has when he's working with a team. 

"In that aspect, we are ok because we don't have players to sell, so none of my players is leaving under any circumstances.

"Many teams will be under pressure until the last moment without knowing how the squad is going to be."

During his last spell in charge at Stamford Bridge between 2004 and 2007, Mourinho led the side to two Premier League titles, an FA Cup and two League Cups. 

And he has already been busy strengthening his squad this time around, having recruited Andre Schurrle, Marco van Ginkel and Mark Schwarzer.

Mourinho has also publicly declared his interest in landing unsettled Manchester United star Wayne Rooney, though Chelsea's first bid for the England international was rejected. 

The club continue their preparations for the new Premier League campaign with a pre-season friendly against an Indonesia All-Stars team on Thursday.