With all the players except injured Rafinha who is not available for the game against Liverpool, Valverde has a lot of option to choose from. But the main suspense in the squad against the English side will be between Ousmane Dembele and Philippe Coutinho.
In vital games like this, Valverde is a coach that selects players based on the current form and performance. This makes the Brazilian more likely to be in the starting line up against Liverpool. But considering the fact that Coutinho is a former Liverpool player, it would be risky starting him. Aside that, the former Liverpool man is in a better form than Dembele.
Dembele who just recovered from an injury have not gotten the rhythm required to face a tough opponent like Liverpool. Although, the coach have given him some minutes to blend into the team. In a very recent La Liga game, both the Brazilian and Frenchman started a game in which Messi was rested. They both played well except for Coutinho missing opportunity to score.
Except for these two, the team is an easy pick. With Ter Stegen at the goal post, Pique and Lenglet in front of the goalkeeper. Alba on the left back while Sergio Roberto may cover the right back. Even though Semedo has the advantage of speed to match handle Sadio Mane.
The midfield will be occupied by Rakitic, Busquet, and Arthur Melo. Although, the latter hardly finishes a game, which may likely see Vidal replace him maybe after halftime. Vidal is also in good form but he usually comes off from the bench and performs great. Of course, Messi and Suarez in the attack while the option from Dembele or Coutinho will be decided by Valverde.