Birmingham owner Carson Yeung has failed in his bid for a one-off return to the United Kingdom as he fights money-laundering charges in his native Hong Kong.
Yeung had initially been granted permission to travel to London from Thursday, through to the 19th, which would have allowed him to take in City's Europa League Group H opener with Portuguese side Braga at St Andrew's.
However, following a decision taken on Wednesday behind closed doors by Hong Kong's High Court, after the Department of Justice asked for a review, that permission has now been revoked.
According to Yeung's lawyer, Clive Grossman, the ruling was made by Judge Peter John Line on the basis his client represented a flight risk.
Blues boss Chris Hughton, meanwhile, is adamant Yeung's situation has no bearing on his preparations for Thursday's match.
"It's something I'm aware of," said Hughton.
"But my biggest responsibility at this moment is setting up a team for a very difficult match.
"That's where all of my energies and focus are, as well as that of the players, and that alone.
"We can't talk about longer term because at this moment we have to face what is in front of us.
"The only area of real concern for us is a series of games coming up, initially against a top-quality team in Braga."
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