Mohamed Salah was rested for the weekend’s Merseyside derby because of a groin problem he picked up in the first leg but returned to training with a fitness coach today.
Reds captain Jordan Henderson is suspended after being shown a late yellow card in the 3-0 win at Anfield.
Young forward Ben Woodburn has returned to training after a month-long absence, but Klopp is still awaiting updates on left-backs Andrew Robertson and Alberto Moreno.
Meanwhile, Sergio Aguero could make his first start for more than a month as Manchester City seek to overturn a three-goal deficit at the Etihad.
The Argentina striker returned to action following a knee injury as a late substitute in Saturday’s derby loss to Manchester United.
There may still be a doubt over centre-half John Stones, who missed the derby with a muscle problem, but left-back Benjamin Mendy (knee) is the only definite absentee.
Manchester City provisional squad: Ederson, Bravo, Walker, Danilo, Otamendi, Kompany, Stones, Laporte, Delph, Zinchenko, Toure, Gundogan, Fernandinho, De Bruyne, Sane, D Silva, B Silva, Sterling, Foden, Diaz, Aguero, Jesus.
Liverpool provisional squad: Karis, Alexander-Arnold, Lovren, Van Dijk, Robertson, Milner, Wijnaldum, Oxlade-Chamberlain, Salah, Firmino, Mane, Mignolet, Clyne, Klavan, Masterson, Moreno, Woodburn, Kane, Jones, Ings, Solanke.