Former Charlton striker Paolo di Canio has explained his decision to join Lazio to the club's fans.
The 36-year-old signed a one-year extension to his Charlton deal in June, but found the offer to return to his first club irresistible.
"I can only apologise to Alan Curbishley and the supporters of Charlton, for whom I have the greatest affection," said Di Canio.
"This is the most difficult career decision I have ever had to make."
Di Canio added: "When I signed my contract with Charlton, it was my intention to do everything I could to help the club improve on seventh place.
"In recent weeks it has become clear to me how much my family wish to stay in Rome.
"This, coupled with the fact that Lazio are prepared to offer me a contract, has convinced me that the time is right for me to return to Rome.
"I have often said I wished I joined Charlton earlier in my career, and whatever has happened I will always believe this to be so.
"The supporters were always right behind me and I hope they will not be angry with me and will understand that, where your family is involved, you sometimes have to do things which are very painful."