Chelsea, on their part, do not really have any concern over his attitude as the delay was all because of the passport issues.
Maurizio Sarri has been labelled as "one-dimensional" by Napoli chairman Aurelio De Laurentiis, who revealed that the new Chelsea manager signed a contract forbidding him from taking any more of the Serie A club's players.
But Sarri says no decisions have been made and he is looking forward to meeting the trio for the first time on Saturday.
The Belgian spent half of last season on loan at Borussia Dortmund as he sealed a place in the Belgium World Cup squad.
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And Sarri has confirmed Hudson-Odoi will stay at the club and fight for a place in the first-team for the new season.
What did we learn from Arsenal's pre-season clash with Chelsea? I never met him or played against him.
It's very important. They were champions last season and played well.
"We are talking about top players and I think every club wants to keep top players".
Hudson-Odoi will be hoping to feature when Chelsea face Manchester City in the Community Shield on Sunday afternoon.
"I want to speak to him before I answer these questions", he said when asked if Willian had returned to training on Wednesday.