Giovanni Trapattoni said he wouldn't sleep on Monday night after his side lost 2-0 to Italy in their final Group C clash.
"In my life I had many successes and have been manager of great teams before I took over a country," he said. "I had the habit of always winning but when I lose I don't sleep at night. I think about whether I made a mistake. I'd have liked to play again immediately the games against Croatia and Spain.
"But against Italy we played well. I have this willingness to begin again because I'm sure all the fresh energy in this squad or the new squad can do better.
"I'm looking forward to starting again in the new season."