Liverpool v Porto: preview and possible line-ups

Jurgen Klopp will be missing one of his key men, as Andy Robertson was booked late on against Porto and will therefore be absent from the Porto tie. Alberto Moreno or James Milner are the obvious choices for Klopp, who may look to rotate his squad with a tough Premier League run-in. Georginio Wijnaldum has been heavily used and may be rested, with Fabinho the obvious choice to replace him. Jordan Henderson and Naby Keita will likely be present in midfield with him. Alex Oxlade-Chamberlain and Joe Gomez are still injured. Adam Lallana is struggling with a muscular injury and will also likely be missing.
Vincent Aboubakar will be out for the tie after rupturing his ACL, although defensively is where Porto have their problems, Pepe is suspended, as is Hector Herrera, with Alex Telles potentially missing the tie through injury. Jesus Manuel Corona, Tiquinho and Danilo Pereira are all likely to play for Porto, with Moussa Marega looking to become just the 4th player in Champions League history to score in 7 consecutive matches.
Jurgen Klopp on Liverpool's support for this game at Anfield and last year's tie:
"I've mentioned before that the supporters were a key factor in our win against Spurs and there is no doubt we need them all at their best for this game."
"I hope we are prepared, we tried everything to be as well prepared as possible."
Sérgio Conceição on Porto's ambitions and his feelings towards the Porto side:
"We are all ambitious. But The important thing is the moment. What we reap will be according to what we do in these two games, speaking of the Champions League. One step at a time"
"Humility, game play and a lot of work are important features of this team. I feel Like a lucky guy for working in this House and representing a club that tells me so much"
Liverpool have won 4 of their laast 5 Champions League Quarter-Finals, only losing to Chelsea in 2008-09.
The last time Porto reached the Semi-Finals of the competition, they ended up winning the Champions League (2003/04).
Porto have lost 5 of their previous 8 two-legged ties against English opposition.
Liverpool: Alisson; Alexander-Arnold, Matip, Van Dijk, Milner; Fabinho, Henderson, Keita; Salah, Firmino, Mane.
Porto: Casillas; Militao, Felipe, Leite, Telles; Corona, Danilo, Otavio, Brahimi; Marega, Soares