Striker Romelu Lukaku, 26, will be fined by Manchester United for missing training without permission.
Report gathered that Belgium international, Lukaku, has trained at his former team Anderlecht for the past two days on Monday, although it was a day off for United players.
Serie A sides Inter Milan and Juventus remain keen on the forward, who did not play in the Premier League club's pre-season matches because of injury.
Lukaku's agent has flown to London in an attempt to resolve his future.
Federico Pastorello is expected to meet officials from both United and Inter to try and find some common ground between the clubs, according to Simon Stone of BBC.
The clubs remain apart in their valuation of the striker, with United wanting to recoup at least the £75m they paid Everton two years ago.
In July, United rejected a £54m bid from the Italian giants for Lukaku, who is still to return to Manchester even though he was expected back at the club on Tuesday.
Inter manager Antonio Conte has previously confirmed the striker remains his number one target, saying: "I consider him a player who could improve our team."
Romelu Lukaku has scored 42 goals in 96 appearances for United the past season.
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