Gerrard slightly injured his groin in Liverpool's 1-0 win over Fulham on Saturday but came through a training session on Tuesday unscathed, manager Rafa Benitez told a news conference.
Liverpool, however, will be without the suspended Javier Mascherano after the Argentina international midfielder was booked in the second leg of Liverpool's 4-0 win over Real Madrid a month ago.
Drogba did not play in Saturday's 2-0 win at Newcastle United because of an ankle injury, but Chelsea's Dutch coach Guus Hiddink said in his pre-match news conference: "He is fit enough to start the game."
Chelsea's Portuguese defender Jose Bosingwa, who damaged a hamstring while on international duty last week, is out of Wednesday's match.
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