“It’s been a tough decision but I am pulling the plug. It has been difficult in recent years. The last two-three years I think I’ve been at an acceptable level. But acceptable is not good enough for me.
“I don’t want my level to fall any further and so it was time to stop,”
He also added on Twitter:
“Thank you for your support. A great experience. It’s sad but it’s the right decision to stop.”
The Denmark international centre-back began his career in 2004 at boyhood club Brondby before he moved to Liverpool, although his eight-year spell on Merseyside was hampered by injuries.
He returned to Brondby in 2014 after turning down offers from other Premier League and European teams saying he was feeling the effects of playing regularly in a league that is as physically demanding as the Premier League, although he later implied in an interview with Danish television that his relationship with former Liverpool manager Brendan Rodgers had broken down.
Agger has made 232 appearances and scored 14 goals for the Reds after joining them from Brondby in 2006 and won the League Cup and Community Shield during his time at Anfield. He has also been capped 75 times by his country, scoring 12 goals, and also featured at the 2010 World Cup and 2012 European Championships.
Meanwhile, Liverpool’s retained and released list is set to be revealed with the futures of Kolo Toure and Joao Carlos Teixeira among those to be decided. The lists submitted by all 20 Premier League clubs will be made public on Friday afternoon, detailing which players have been retained by the club and which have been released.