Jurgen Klopp had 26 players in his squad for training on Monday, with Liverpool in fine form as they look to revive their fortunes against Rangers.
After the momentum of a late 2-1 win over Ajax, the Reds suffered another collapse as they drew 3-3 with Brighton following their return from the international break.
Klopp blamed the problem in part on a lack of pace after two postponed Premier League games, but there are more fundamental issues to address across his team.
Much of his work will be done during exceptional hours on the training ground, including an open session in front of the cameras on Monday night.
Liverpool take on Rangers in their third Group A game on Tuesday night, serving as the first competitive meeting between the two giants of English and Scottish football.
There are likely to be changes to the squad Brighton had, with potential alterations to defence, midfield and attack.
Ibrahima Konate is hoping to feature for the first time this season, with the Frenchman as part of the 26-man squad at the AXA Training Center, while Caoimhin Kelleher and Calvin Ramsay could also join him.
Darwin Nunez could push for a first start at Anfield, having only appeared off the bench in the last three games, but the Uruguayan faces strong competition from Roberto Firmino and Diogo Jota.
Thiago is among those almost guaranteed a place, with less certainty about the roles of Fabinho and Harvey Elliott alongside him.
In defence, Kostas Tsimikas will be required again, with Andy Robertson still absent along with Curtis Jones, Naby Keita and Alex Oxlade-Chamberlain.
While Konate is unlikely to replace Joel Matip in central defence, there is debate over whether Trent Alexander-Arnold will remain at right-back amid a shaky run, with Joe Gomez able to step in.
Despite their struggles on the pitch, the group remained positive as they put themselves to the test, with smiles on their faces as they went through a series of physical exercises.
The Liverpool squad in training on Monday
Goalkeepers: Alisson, Kelleher, Adrian, Pitaluga, Mrozek
Defenders: Van Dijk, Matip, Konate, Gomez, Phillips, Alexander-Arnold, Tsimikas, Ramsay
Midfielders: Thiago, Fabinho, Henderson, Milner, Arthur, Elliott, Bajcetic
Forwards: Salah, Diaz, Firmino, Jota, Núñez, Carvalho
