Manchester United insist Wayne Rooney is not for sale but have kept tight-lipped about Chelsea's fresh bid for their star striker.
Manager Jose Mourinho confirmed in Bangkok on Wednesday that the London club had made a "clean" and "ethical" offer for Rooney, worth a reported STG10 million ($A16.57 million).
However British news reports said United had turned down the bid.
"End of story - we made a bid and now it's up to Man United and it's up to the player," said the Chelsea manager, who dismissed claims Juan Mata or David Luiz were also offered as make-weights.
"We love the player, we are interested in the player, we made the bid. We have nothing more to say and nothing more to do. And now we have to respect and be ethical in this process.
"The official bid is just about a certain amount of money, it doesn't involve players and it doesn't involve players in the possibility of the negotiations to continue."
Rooney is back in the UK after leaving the Red Devils in Bangkok with a hamstring injury just a few hours into their pre-season tour.
Reports have since emerged that the England international was "angry and confused" at comments from new boss David Moyes that suggested he would play second fiddle to Robin van Persie this season.
Moyes, currently in Sydney for Saturday's sold-out match against the A-League All Stars, avoided the issue at United's first press conference in Australia on Sunday and again at their official lunch in Sydney on Thursday.
But club legend Bryan Robson, one of four ex-players touring with the Red Devils, brushed aside the hype.
"David Moyes has said Wayne Rooney is not for sale. As far as we're concerned, that's the end of it," he told reporters.
Asked about the offer from Chelsea, Robson said: "I don't know, you've got to ask David Moyes and (executive vice-chairman) Ed Woodward about that. I can't really comment on that."
United's longest-serving captain added the ongoing speculation about Rooney had not distracted the team from their pre-season preparations, insisting it was business-as-usual.
"They're getting on with training. Unfortunately Wayne got the hamstring strain, which he didn't want - you don't want any of your top players out at this stage of the pre-season.
"But it hasn't been a disruption to the other boys."
He did, however, voice support for Barcelona's Cesc Fabregas amid reports Woodward has left Australia to carry out urgent transfer business involving the midfielder.
"I think Fabragas is a fantastic player and hopefully he's playing for Manchester United next season," Robson said.
"I hope Ed is very successful, if that's what he's gone back to England to do."