The 29-year-old Denmark international announced that he had sealed a return to his boyhood club on Saturday morning after moving to Liverpool from Brondby in a £5m deal in January 2006.
I have turned down many offers to move to other Premier League and European clubs
Agger has fallen down the pecking order despite being named vice-captain at the start of last season, struggling to secure a stating spot amid niggling injury problems.
And the long-serving Reds centre-half conceded that his body is finding the rigours of the Premier League too demanding, prompting his decision to return to Denmark.
“Liverpool have been such a big part of my life and my family’s lives for so long, that leaving is extremely difficult,” Agger told Liverpool’s website.
“The opportunity arose for me to return home to Brondby and at this stage of my career it felt like the right decision for me.
“I wouldn’t leave here to go anywhere else and that has been proven by my actions in recent seasons – I have turned down many offers to move to other Premier League and European clubs.
“I would like to thank the Liverpool supporters for the incredible backing they have given me in my time here and the warmth and generosity of spirit displayed to my family.
“This has been our home and somewhere we have been very happy and settled. However, more recently I have started to feel the effects of playing regularly in a league that is as physically demanding as the Premier League is, and I would not want to stay if I did not think that I was able to meet that challenge week in, week out.
“The club itself is very special and I shall remain a supporter for the rest of my life. I regard every game I played at Anfield as a privilege.”
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