Anthony Martial was also absent and both players are said to be doing ‘alternative gym-based training’
Romelu Lukaku did not train with the Manchester United squad on Thursday, which will do little to dampen speculation about his future.
The Belgium striker is likely to leave Old Trafford this summer after falling down the pecking order under Ole Gunnar Solskjaer, who will use Marcus Rashford as the main forward for the 2019/20 campaign.
United are in Australia for their pre-season tour and Lukaku was missing from the training session in front of 12,000 fans at the WACA, though it is said he was doing alternative gym-based work, along with fellow forward Anthony Martial.
Manchester Evening News reporter Samuel Luckhurst reported the striker had a ‘little problem’ so the club did not want to risk him.
Lukaku has been linked with Inter and has even spoken about his admiration for the Italian league and in particular new manager Antonio Conte.
And, in addition to scheduled friendlies against Perth Glory and Leeds United, United head to Singapore where they will actually play Inter.
San Siro chiefs are reportedly in London to try and seal a deal for the 26-year-old, with The Guardian reporting the Serie A club want a two-year loan followed by an obligation to buy in deal worth £63million.