"Is there any history between Newcastle and Liverpool that I don't know about? The atmosphere was like there was something that happened in the past."
Jurgen Klopp's question was understandable at the end of an enthralling 3-2 Liverpool win at St James' Park back in 2019.
A raucous Tyneside atmosphere had been ramped up further by controversy on the pitch and fights off it, with the presence of Liverpool fans in the Newcastle United sections – hoping to see their side take another step towards Premier League glory – playing its part.
Of course, when Newcastle were going for the title in the 1990s, Liverpool tried and succeeded to spoil the party with a pair of epic 4-3 Anfield wins, even if that meant helping rivals Manchester United to twice take top spot.
Newcastle's class of 2019 had similarly given their all – but not because it was Liverpool, with Rafael Benitez's men and their supporters relieved not to be relegated rather than worrying about settling scores.
For Newcastle, there is rather more riding on the outcome of Liverpool's visit this weekend for another Saturday night match. This one, Klopp might note, will have a little more history.
Liverpool are the only team to have beaten Newcastle in the Premier League this season, and that reverse fixture, back in August, was another hot-tempered affair.
A marginal offside call denied Alexander Isak a second goal, before Liverpool rallied to win with a 98th-minute winner having been repeatedly frustrated by the Newcastle time-wasting that led to the game dragging on so long.
It felt like a big moment for Liverpool as they went ahead of Newcastle with just their second victory in five matches at the start of the campaign. Meanwhile, the visiting players were booed off the pitch.
Heading into the return match, however, Liverpool are back below Newcastle. In fact, they are nine points below this weekend's hosts – the largest margin in the Magpies' favour ahead of a fixture between the two sides in the Premier League era. This is the first time since 1995-96, with that Stan Collymore winner, that Newcastle have led Liverpool going into both home and away meetings.
As Liverpool's season went on a downward spiral almost from the moment Fabio Carvalho broke Geordie hearts with his best Collymore impression, Newcastle – then missing a number of key men – were emboldened by the furious reaction of the Anfield crowd.
"My ideal is that we're booed off every week when we go to away grounds, because you don't want to be popular," Eddie Howe said afterwards ahead of a 17-match unbeaten league run, Newcastle's joint-longest in their history.
"We're here to win, we're here to compete," Howe added, "and we'll do whatever it takes to try to win."
Except Newcastle's undefeated streak has included only nine wins, topped up by eight draws – including five in their past six and three in a row.
Progress to the EFL Cup final has maintained Newcastle's momentum, but frustration has just started to fester since the semi-final, which was followed by stalemates against strugglers West Ham and Bournemouth that saw the Magpies fall to fourth.
While Newcastle may have a nine-point cushion to Liverpool, they equally could be level on points with the Reds by the time they play again in the league if Saturday's result goes against them.
Manchester City, winners at Arsenal in midweek, have shown how quickly such a gap can vanish.
The four-match winning run Liverpool would require for such a rapid turnaround – including Monday's defeat of Everton – seemed highly unlikely at the start of the week, but such a streak has proven very much within their capabilities in the past.
Liverpool won four in a row in the Premier League as recently as December, their 12th sequence of four or more consecutive victories under Klopp. Those include 17- and 18-match winning runs.
That is the threat Newcastle must attempt to guard against – along with challenges from Tottenham, Brighton and Hove Albion and the rest of the chasing pack.
As for Arsenal on Wednesday, a draw might well suit Howe's men. The form book suggests that result is likely, too, but an atmosphere akin to that of four years ago will not allow Newcastle to play conservatively.
They have the final next, then a trip to City. Liverpool face Real Madrid on Tuesday and host Manchester United at the start of next month.
A season-defining stretch for both teams might itself be defined first by what happens at St James' Park.