The attacking midfielder suffered a calf injury last weekend at Manchester City and missed the Carabao Cup win against Wolves.
Keinan Davis sustained a hamstring problem during the Wolves game and he will be out for around three to four weeks, while fellow forward Jota will resume training on Monday after recovering from a hernia operation.
If the Brazil international were to be shown his fifth yellow card of the season he would be ruled out of next week's crunch clash with Manchester City, so Klopp may opt for Georginio Wijnaldum in the holding role.
Aston Villa provisional squad: Heaton, Steer Guilbert, Engels, Mings, Taylor, Elmohamady, Konsa, Nakamba, Targett, McGinn, Hourihane, Lansbury, Grealish, Trezeguet, El Ghazi, Wesley, Kodjia.
Provisional squad: Alisson, Adrian, Alexander-Arnold, Lovren, Van Dijk, Gomez, Robertson, Wijnaldum, Henderson, Lallana, Milner, Fabinho, Oxlade-Chamberlain, Salah, Firmino, Mane, Origi, Brewster.