Captain Steven Gerrard's penalty gave Liverpool a 1-0 advantage after the first leg of their Carling Cup semi-final against Manchester City at the Etihad Stadium.
The England international slotted home his fourth goal of the season after the hapless Stefan Savic had fouled Daniel Agger in the 13th minute.
City, missing key trio Vincent Kompany, David Silva and Yaya Toure, suffered back-to-back home defeats for the first time since February 2008 having lost to Manchester United in the FA Cup at the weekend.
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