Celtic have released from Brazilian international Juninho after the former Middlesbrough midfielder failed to adapt to the rigours of the Scottish Premier League.
Juninho is to return to his native Brazil after a disappointing stint at Parkhead in which he made 22 appearances and scored just one goal.
Celtic boss Martin O'Neill has previously expressed his regret that the move has failed to work out after he played a starring role on his debut against Rangers last August.
"I am disappointed. I thought he would come here and it would be a new lease of life for him. It has been disappointing but I told him that I wouldn't keep him prisoner either," O'Neill said.
Juninho's agent Brian Hassell added: "He is very disappointed with how things have transpired."
"I have been in this game an awful long time and after 30-odd years to see his first game against Rangers, with the Celtic crowd, was one of the biggest thrills in my life."
"So you can understand how he must be feeling with the way things have gone since then. Everyone concerned is disappointed that it has come to this. Of course he has regrets."
Juninho felt he was a victim of O'Neill's tactics and described the Scottish top flight as 'ridiculous'.