Anfield atmosphere
As former Reds striker Ian St John once said, 'There's no noise like the Anfield noise'.
Once again on the biggest stage, Anfield has hosted nights that will live long in the memory.
That said, the opposition haven't tended to enjoy their trip to L4.
The 2004-05 Champions League semi-final second leg against Chelsea - the game that booked Liverpool's place in the 2005 final - is a classic example of how the deafening support around the ground can leave visitors shell-shocked.
In an interview with BT Sport, former Blues captain John Terry described just what it was like to be in this environment: "You felt like you were just in a big cauldron. You stand there and all you see is red. Even talking about it now, you get goosebumps a little bit."
Throughout the years, the wish among Reds fans has been to bring opponents back to Anfield for European second legs. No matter the outcome of the first encounter, there was always a belief that, at Anfield, anything is possible.
This season, however, things had to be done slightly differently.
Two of Liverpool's three knockout matches saw them play at home first. But this proved to be no problem.
Klopp's men blitzed FC Porto 5-0 at Estadio do Dragao in the Round of 16 to place them within touching distance of progressing to the quarter-finals of the competition, which left little work to be done in the return. Liverpool departed Portugal not only with an extremely healthy lead but also with a new song, which would continue to ring out around Anfield in the latter stages of the Champions League.
'Allez, Allez, Allez'.
A 0-0 second-leg stalemate saw the Reds advance to the next stage and it was Manchester City who awaited.
The record-breaking season City had enjoyed gave Pep Guardiola's men hope that they could achieve their first victory at Anfield since 2003, but Liverpool had other ideas.
This was a throwback to European nights not seen in these parts for quite some time.
Like when the sides met here in January in the league, Liverpool raced ahead with a quickfire burst of goals. Klopp's side were 3-0 up within half an hour.
Anfield was sent into raptures.
Semi-final opponents AS Roma suffered a similar fate, as they too succumbed to their suffocating surroundings. Liverpool were 5-0 up by the 68th minute of play.
Although I Giallorossi snatched two late goals, the Reds had again placed themselves in an unbelievable position heading into the second leg.
European nights under the lights at Anfield - there's nothing quite like it.