The manager makes four changes to his XI for the opening match of the Champions League semi-final, with Roberto Firmino on the bench after injury.
Fabinho, Joe Gomez, Joel Matip and James Milner come into the side.
Asked about Firmino’s condition and the decision to name the No.9 among the substitutes, Klopp told BT Sport: “That’s how it is with the short periods between the games – you cannot be sure.
“Bobby wants to [play] and the medical department told me ‘yes, it’s good’ but then you have to make sure – I’m not sure if 90 minutes or whatever.