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Trapattoni, who is also without Preston's Keith Treacy due to a persistent calf problem, has not called up any midfield reinforcements.
Treacy, who was on standby, did not travel, with Preston insisting he needs rest to get over a long-standing problem.
Trapattoni would have included the player had it not been for Preston's insistence that he needed to stay in Lancashire.
In Italy, Treacy would have been expected to report and be assessed by medical staff, but Trapattoni has accepted Preston manager Darren Ferguson's decision to keep him close to home.
Trapattoni said: "They said he is injured. He can play, but he needs rest. They wanted to rest him so he could recover.
"Always after one hour, he is in pain in his groin and they think it is better he stays at home.
"After the last game, he played 60 minutes, he felt it and we hope with this rest, he gets better.
"In Italy, we have other habits. If a player is injured, our doctor speaks with their doctor, he comes in and then he goes home. In Italy, players always come.
"It's not a problem of believe or not believe. I am not a doctor."
Treacy has been battling his injury for some time and has been unable to play for his club on a sustained basis.
Trapattoni said: "He can play 20 minutes and he has pain in his groin. He plays 20 minutes, 60 minutes, but then he is not fit so it is not possible to come with us.