Achterberg posted to social media: "After 15 years at the club, I have decided with a heavy heart to leave LFC.

I have loved each day working at this amazing club, but after a long think I feel it could be right for me to start a new challenge.

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"I would like to thank FSG for all the support during those 15 years – Mike Gordon, John Henry, Tom Werner and Billy Hogan.

It has been a privilege to work for the biggest and greatest club in world football with its amazing supporters.

He is one of [the] best managers in the history of the city, the club and world football.

"He created world-class teams with his man-management skills, he brought us back to being believers, winners, and a force in European and world football.