Munsef is due to take his chance in the Stockholm Cup at Taby racecourse in Sweden on Sunday.
Collier Hill famously won the Group Three event for Alan Swinbank in 2004 and 2006 and Ian Williams has highlighted the event for the former John Dunlop-trained seven-year-old.
Having won three of his four starts since joining Williams, he could not be in better form.
“He won very well at Chester and although he went up 4lb for winning at Ascot, he beat Mystery Star again and the step up in trip seemed to suit him,” said Williams.
“He actually goes to Stockholm on Sunday for the Stockholm Cup, which is a competitive Group Three, and Jim Crowley rides.
“It is not beyond the realms of possibility that he then might take off to Melbourne for the Melbourne Cup for which he has a lovely racing weight of 53 kilos, and Dr Koukash (owner) and the team are quite keen to go,” he told At The Races.