The 25-year-old is out of contract at the Reebok Stadium next summer and has yet to agree terms on a new deal and it’s now likely that he will leave the club in January.
Stamford Bridge appears to be his most likely destination with Villas-Boas keen to bolster a defence that has conceded 15 goals in 11 league games this season keeping only two clean sheets in the process.
Concerns remain over Brazialian David Luiz’s suitability to English football whilst fellow countryman Alex is set to be offloaded with Juventus keen on the 29-year-old.
Cahill was a wanted man in the summer with Arsenal and Tottenham chasing him but ultimately being put off by the Trotters £15 million asking price.
But with the England international’s contract running out it’s reported that manager Owen Coyle will let him go for half of that fee rather than lose him for free next year.
The good relationship shared between Villas-Boas and Coyle could see young midfielder Josh McEachran join Bolton on loan after the Blues were impressed by the way Daniel Sturridge flourished during his temporary stay in the North West last season.