New Liverpool signing Sotirios Kyrgiakos says he has calmed down since his time at Rangers.
He said: "I am very happy to have this chance even though I had just signed a new contract with AEK. But although it was a good contract, you never stop having ambitions in life, and that is why I am here.
"When you are approached by a club like Liverpool, it is an offer you just cannot refuse.
"I hope that I can bring my strength to this squad, I am good in the air and I have a lot of experience now, so I hope I can be of benefit to Liverpool. I have played for Rangers in Scotland and Frankfurt in Germany, that has given me a lot of experience of competitive leagues so I believe I will adapt quickly."
He added: "I know that there have not been many Greek players who have been successful in the English game, so I feel that I have something to prove for my country, that we can play at this level.
"For me it is a chance to have success at the very top. I was injured when Greece were European champions in 2004, these things happen in football. So I have plenty of motivation to do well in the Premier League and help Liverpool to be successful.
"I had a few disciplinary problems in Scotland, but not too much. I feel I have learned now how to be physical in this style of football."