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Team news
Liverpool will be without Alex Oxlade-Chamberlain, who has been ruled out for the season (an the World Cup) with a knee injury.
Klopp expects Sadio Mane to return for the Reds after missing Saturday's draw against Stoke at Anfield.
Neither side has any players suspended for the second leg, although Trent Alexander-Arnold, Dejan Lovren, James Milner, Federico Fazio and Nunes Jesus are all carrying yellow cards.
Predicted line-ups
Liverpool (4-3-3): Karius; Alexander-Arnold, Lovren, Van Dijk, Robertson; Milner, Henderson, Wijnaldum; Salah, Firmino, Mane
AS Roma (3-5-2): Alisson; Fazio, Manolas, Juan Jesus; Florenzi, Strootman, De Rossi, Nainggolan, Kolarov; Schick, Dzeko