Agger was long linked to a transfer to a big club, and in the January 2006 transfer window, he got his wish and was looking to join Premier League team Liverpool, then holders of the UEFA Champions League. Agger did not travel with his Brøndby teammates for their winter training camp in January and on 12 January 2006, he signed a -year contract with Liverpool. The £6 million fee made him the most expensive footballer sold by a Danish club to a foreign club. During his first half-season at Liverpool, injuries limited Agger to four first-team appearances, and he missed the club's victory in the 2006 FA Cup Final.