The Reds play host to Real this time around, looking to overturn a 3-1 deficit from the first leg in Madrid, buoyed by a vital away goal from Mohamed Salah.
Unhelpfully, no journalists asked Klopp about the fitness of his squad in a frankly tedious press conference earlier on Tuesday, leaving clues to be taken from an open session in the evening sun.
A spirited exercise began with a round of Happy Birthdays for Neco Williams, who has turned 20, before stretches led by fitness coach Conall Murtagh.
It is rare that the squad would train with only three goalkeepers, and the club later confirmed that Alisson had worked with the group as usual.
Klopp called upon a host of youth players to flesh out the ranks, with Mateusz Musialowski clearly emerging as a favourite of the manager, joining Ben Woodburn, Jake Cain and Leighton Clarkson for the session.
It could be that Musialowski is even included on an extended substitutes’ bench at Anfield, though as of yet neither he nor Woodburn have been registered with UEFA for the game.
There are unlikely to be many changes to Klopp’s starting lineup from the 2-1 victory over Aston Villa at the weekend, though Thiago can be expected to come in and there is a chance Sadio Mane joins the attack.
Liverpool squad training on Tuesday
Defenders: Phillips, Kabak, B.Davies, R.Williams, Alexander-Arnold, Robertson, N.Williams, Tsimikas
Forwards: Salah, Jota, Mane, Firmino, Shaqiri, Musialowski