Few managers have embedded themselves under the skin of Liverpool more than Jose Mourinho.
For over 15 years the Portuguese has become something of an arch-rival for those who populate the Kop.
The sneering pantomime villain, profiting from the the bear traps he has meticulously set. He's not for them.
Throughout his two spells with Chelsea and later Manchester United, Mourinho has long held an almost unique ability to rile Reds.
The history of this particular feud dates back to around 2004 when he and Rafa Benitez arrived in the Premier League as the latest hotshot imports from European football.
The specifics of those early days need no repeating.
The shushing in Cardiff, the 'ghost goal' and the regular battles in fixtures that usually had 'final' at the end of them, helped make this rivalry a particularly sour one.
The sight of an apparently unwell Mourinho dancing a jig towards the Anfield Road end later in 2014, after a 2-0 win for Chelsea, only furthered the resentment towards a manager whose controversies are almost as memorable as his achievements to some.
It's two years to the day since he last visited Anfield, when his Manchester United side were well beaten against a rampant Reds that would go on to lose out on the title by a single point before clinching the Champions League.
Mourinho's tenure at Old Trafford would be over days later and Liverpool supporters might have thought then that they had seen the last of their old enemy.
Even when the Reds locked horns with Mourinho once more at the start of the year, it felt like the phony war. A pale imitation of what has preceded it.
By the time Liverpool made their first visit to the Tottenham Hotspur Stadium in January, Mourinho has gone from being an irritant to an irrelevance to a title-chasing Reds.
A 1-0 win saw them become the first team in any of Europe's top-five leagues to win 20 of their opening 21 matches and the three points saw them go 16 clear at the summit.
The famous battles with Mourinho were a thing of the past, it seemed.
Wednesday night's reunion, however, might just see some rumblings of what was previously thought to be a dormant dispute.
A top-of-the-table clash that will hand some festive initiative to whoever comes out on top.
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Liverpool's disappointing showing at Fulham was an opportunity spurned for the champions as they look to wrestle back the top spot that Spurs are holding on to via goal difference right now.
Victory at Craven Cottage would have meant a five-point carrot would have been dangled in front of a Reds team who are unbeaten in 65 games at Anfield.
As it stands, the chance to go three clear of a team who must be considered their title rival is a big enough incentive in the hunt for league crown No.20.
Mourinho, though, will have a plan. He usually does.
The 10 goals his Spurs team have shipped so far is a classic of Mourinho's genre.
Their run has been built on solidity at the back and a reliance on the dovetailing of Heung-min Son and Harry Kane up top.
The devastating duo are one of the in-form partnerships in European football, having contributed 19 goals and 12 assists between them already.
Two years to the day since Mourinho last pitched up at Anfield, he may feel has some unfinished business to attend to.
But 2,000 fans inside the ground - and Jurgen Klopp himself - will be more than ready to afford him a special welcome back of their own.
Is the third instalment of this storied rivalry about to begin?
