Liverpool have a huge task if they are to progress into the last eight of the Champions League.
The Reds are trailing Real Madrid 5-2 after the first leg at Anfield, as they look to stay in the tie in Madrid.
Real star Luka Modric is one who Liverpool will have to control if they are to progress.
In a recently documentary, the Croatian is heard saying about a Champions League tie against PSG last season: There was a lot of criticism and such, and we knew that we had to change.
But despite not playing well and that they were better, when I left the field I gave Carvajal a message that turned out to be true."
He then said to teammate Dani Carvajal: "We are going to crush them (PSG) in the return leg (in Madrid)."